Remove executable_semantics files that were accidentally re-created (#1227)

Remove files accidentally duplicated in e85f45de10a6e0053d8827848c151f276c2b4d6a between explorer/ and
executable_semantics/. Each removed file already has a corresponding file in explorer/.

executable_semantics/testdata/function/auto_return/fail_no_return.carbon

@@ -1,19 +0,0 @@
-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// RUN: %{not} %{executable_semantics} %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
-// RUN: %{not} %{executable_semantics} --parser_debug --trace_file=- %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes %s
-// AUTOUPDATE: %{executable_semantics} %s
-
-package ExecutableSemanticsTest api;
-
-fn NoReturn() -> auto {
-// CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/function/auto_return/fail_no_return.carbon:[[@LINE+1]]: control-flow reaches end of function that provides a `->` return type without reaching a return statement
-}
-
-fn Main() {
-  NoReturn();
-}

executable_semantics/testdata/function/fail_non_exhaustive_match.carbon

@@ -1,18 +0,0 @@
-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// RUN: %{not} %{executable_semantics} %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
-// RUN: %{not} %{executable_semantics} --parser_debug --trace_file=- %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes %s
-// AUTOUPDATE: %{executable_semantics} %s
-
-package ExecutableSemanticsTest api;
-
-fn Main() -> i32 {
-  match (0) {
-    case 1 => return 0;
-  }
-// CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/function/fail_non_exhaustive_match.carbon:[[@LINE+1]]: non-exhaustive match may allow control-flow to reach the end of a function that provides a `->` return type
-}

executable_semantics/testdata/import/fail_order.carbon

@@ -1,18 +0,0 @@
-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// RUN: %{not} %{executable_semantics} %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
-// RUN: %{not} %{executable_semantics} --parser_debug --trace_file=- %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes %s
-// AUTOUPDATE: %{executable_semantics} %s
-
-package ExecutableSemanticsTest api;
-
-fn Main() -> i32 {
-  return 0;
-}
-
-// CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/import/fail_order.carbon:[[@LINE+1]]: syntax error, unexpected IMPORT, expecting END_OF_FILE
-import ExecutableSemanticsTest library "Nonexistent";

executable_semantics/testdata/name_lookup/fail_block_duplicate.carbon

@@ -1,18 +0,0 @@
-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// RUN: %{not} %{executable_semantics} %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
-// RUN: %{not} %{executable_semantics} --parser_debug --trace_file=- %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes %s
-// AUTOUPDATE: %{executable_semantics} %s
-
-package ExecutableSemanticsTest api;
-
-fn Main() -> i32 {
-  var x: i32 = 0;
-  // CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/name_lookup/fail_block_duplicate.carbon:[[@LINE+1]]: Duplicate name `x` also found at {{.*}}/executable_semantics/testdata/name_lookup/fail_block_duplicate.carbon:14
-  var x: i32 = 0;
-  return 0;
-}

executable_semantics/testdata/name_lookup/fail_class_duplicate.carbon

@@ -1,21 +0,0 @@
-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// RUN: %{not} %{executable_semantics} %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
-// RUN: %{not} %{executable_semantics} --parser_debug --trace_file=- %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes %s
-// AUTOUPDATE: %{executable_semantics} %s
-
-package ExecutableSemanticsTest api;
-
-class Foo {
-  var x: i32;
-  // CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/name_lookup/fail_class_duplicate.carbon:[[@LINE+1]]: Duplicate name `x` also found at {{.*}}/executable_semantics/testdata/name_lookup/fail_class_duplicate.carbon:14
-  var x: i32;
-}
-
-fn Main() -> i32 {
-  return 0;
-}

executable_semantics/testdata/name_lookup/fail_global_duplicate.carbon

@@ -1,19 +0,0 @@
-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// RUN: %{not} %{executable_semantics} %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
-// RUN: %{not} %{executable_semantics} --parser_debug --trace_file=- %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes %s
-// AUTOUPDATE: %{executable_semantics} %s
-
-package ExecutableSemanticsTest api;
-
-var x: i32 = 0;
-// CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/name_lookup/fail_global_duplicate.carbon:[[@LINE+1]]: Duplicate name `x` also found at {{.*}}/executable_semantics/testdata/name_lookup/fail_global_duplicate.carbon:13
-var x: i32 = 0;
-
-fn Main() -> i32 {
-  return 0;
-}

executable_semantics/testdata/name_lookup/fail_match_duplicate.carbon

@@ -1,20 +0,0 @@
-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// RUN: %{not} %{executable_semantics} %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
-// RUN: %{not} %{executable_semantics} --parser_debug --trace_file=- %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes %s
-// AUTOUPDATE: %{executable_semantics} %s
-
-package ExecutableSemanticsTest api;
-
-fn Main() -> i32 {
-  match (0) {
-    case x: i32 =>
-      // CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/name_lookup/fail_match_duplicate.carbon:[[@LINE+1]]: Duplicate name `x` also found at {{.*}}/executable_semantics/testdata/name_lookup/fail_match_duplicate.carbon:15
-      var x: i32 = 0;
-  }
-  return 0;
-}

executable_semantics/testdata/return/fail_explicit_with_no_return.carbon

@@ -1,20 +0,0 @@
-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// RUN: %{not} %{executable_semantics} %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
-// RUN: %{not} %{executable_semantics} --parser_debug --trace_file=- %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes %s
-// AUTOUPDATE: %{executable_semantics} %s
-
-package ExecutableSemanticsTest api;
-
-fn F() -> () {
-// CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/return/fail_explicit_with_no_return.carbon:[[@LINE+1]]: control-flow reaches end of function that provides a `->` return type without reaching a return statement
-}
-
-fn Main() -> i32 {
-  F();
-  return 0;
-}

executable_semantics/testdata/return/fail_implicit_with_explicit_return.carbon

@@ -1,21 +0,0 @@
-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
-// Exceptions. See /LICENSE for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-// RUN: %{not} %{executable_semantics} %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
-// RUN: %{not} %{executable_semantics} --parser_debug --trace_file=- %s 2>&1 | \
-// RUN:   %{FileCheck} --match-full-lines --allow-unused-prefixes %s
-// AUTOUPDATE: %{executable_semantics} %s
-
-package ExecutableSemanticsTest api;
-
-fn F() {
-  // CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/return/fail_implicit_with_explicit_return.carbon:[[@LINE+1]]: return (); should not provide a return value, to match the function's signature.
-  return ();
-}
-
-fn Main() -> i32 {
-  F();
-  return 0;
-}