Remove toolchain/check/testdata/impl/fail_impl_as_scope.carbon (#5289)

The same things are tested in
toolchain/check/testdata/impl/no_prelude/fail_impl_as_scope.carbon,
along with more cases.

toolchain/check/testdata/impl/fail_impl_as_scope.carbon

@@ -1,179 +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
-//
-// AUTOUPDATE
-// TIP: To test this file alone, run:
-// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/fail_impl_as_scope.carbon
-// TIP: To dump output, run:
-// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/fail_impl_as_scope.carbon
-
-// --- fail_global.carbon
-
-library "[[@TEST_NAME]]";
-
-interface Simple {
-  fn F();
-}
-
-// CHECK:STDERR: fail_global.carbon:[[@LINE+4]]:6: error: `impl as` can only be used in a class [ImplAsOutsideClass]
-// CHECK:STDERR: impl as Simple {
-// CHECK:STDERR:      ^~
-// CHECK:STDERR:
-impl as Simple {
-  fn F() {}
-}
-
-// --- fail_function.carbon
-
-library "[[@TEST_NAME]]";
-
-interface Simple {
-  fn F();
-}
-
-fn Function() {
-  // CHECK:STDERR: fail_function.carbon:[[@LINE+4]]:8: error: `impl as` can only be used in a class [ImplAsOutsideClass]
-  // CHECK:STDERR:   impl as Simple {
-  // CHECK:STDERR:        ^~
-  // CHECK:STDERR:
-  impl as Simple {
-    fn F() {}
-  }
-}
-
-// CHECK:STDOUT: --- fail_global.carbon
-// CHECK:STDOUT:
-// CHECK:STDOUT: constants {
-// CHECK:STDOUT:   %Simple.type: type = facet_type <@Simple> [concrete]
-// CHECK:STDOUT:   %Self: %Simple.type = bind_symbolic_name Self, 0 [symbolic]
-// CHECK:STDOUT:   %F.type.e2e: type = fn_type @F.1 [concrete]
-// CHECK:STDOUT:   %F.df8: %F.type.e2e = struct_value () [concrete]
-// CHECK:STDOUT:   %Simple.assoc_type: type = assoc_entity_type @Simple [concrete]
-// CHECK:STDOUT:   %assoc0: %Simple.assoc_type = assoc_entity element0, @Simple.%F.decl [concrete]
-// CHECK:STDOUT:   %F.type.fe5: type = fn_type @F.2 [concrete]
-// CHECK:STDOUT:   %F.32d: %F.type.fe5 = struct_value () [concrete]
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: imports {
-// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
-// CHECK:STDOUT:     import Core//prelude
-// CHECK:STDOUT:     import Core//prelude/...
-// CHECK:STDOUT:   }
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: file {
-// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
-// CHECK:STDOUT:     .Core = imports.%Core
-// CHECK:STDOUT:     .Simple = %Simple.decl
-// CHECK:STDOUT:   }
-// CHECK:STDOUT:   %Core.import = import Core
-// CHECK:STDOUT:   %Simple.decl: type = interface_decl @Simple [concrete = constants.%Simple.type] {} {}
-// CHECK:STDOUT:   impl_decl @impl [concrete] {} {
-// CHECK:STDOUT:     %Self.ref: type = name_ref Self, <error> [concrete = <error>]
-// CHECK:STDOUT:     %Simple.ref: type = name_ref Simple, file.%Simple.decl [concrete = constants.%Simple.type]
-// CHECK:STDOUT:   }
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: interface @Simple {
-// CHECK:STDOUT:   %Self: %Simple.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
-// CHECK:STDOUT:   %F.decl: %F.type.e2e = fn_decl @F.1 [concrete = constants.%F.df8] {} {}
-// CHECK:STDOUT:   %assoc0: %Simple.assoc_type = assoc_entity element0, %F.decl [concrete = constants.%assoc0]
-// CHECK:STDOUT:
-// CHECK:STDOUT: !members:
-// CHECK:STDOUT:   .Self = %Self
-// CHECK:STDOUT:   .F = %assoc0
-// CHECK:STDOUT:   witness = (%F.decl)
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: impl @impl: %Self.ref as %Simple.ref {
-// CHECK:STDOUT:   %F.decl: %F.type.fe5 = fn_decl @F.2 [concrete = constants.%F.32d] {} {}
-// CHECK:STDOUT:
-// CHECK:STDOUT: !members:
-// CHECK:STDOUT:   .F = %F.decl
-// CHECK:STDOUT:   witness = <error>
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: generic fn @F.1(@Simple.%Self: %Simple.type) {
-// CHECK:STDOUT:   fn();
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: fn @F.2() {
-// CHECK:STDOUT: !entry:
-// CHECK:STDOUT:   return
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: specific @F.1(constants.%Self) {}
-// CHECK:STDOUT:
-// CHECK:STDOUT: --- fail_function.carbon
-// CHECK:STDOUT:
-// CHECK:STDOUT: constants {
-// CHECK:STDOUT:   %Simple.type: type = facet_type <@Simple> [concrete]
-// CHECK:STDOUT:   %Self: %Simple.type = bind_symbolic_name Self, 0 [symbolic]
-// CHECK:STDOUT:   %F.type.e2e: type = fn_type @F.1 [concrete]
-// CHECK:STDOUT:   %F.df8: %F.type.e2e = struct_value () [concrete]
-// CHECK:STDOUT:   %Simple.assoc_type: type = assoc_entity_type @Simple [concrete]
-// CHECK:STDOUT:   %assoc0: %Simple.assoc_type = assoc_entity element0, @Simple.%F.decl [concrete]
-// CHECK:STDOUT:   %Function.type: type = fn_type @Function [concrete]
-// CHECK:STDOUT:   %Function: %Function.type = struct_value () [concrete]
-// CHECK:STDOUT:   %F.type.bc7: type = fn_type @F.2 [concrete]
-// CHECK:STDOUT:   %F.0a2: %F.type.bc7 = struct_value () [concrete]
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: imports {
-// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
-// CHECK:STDOUT:     import Core//prelude
-// CHECK:STDOUT:     import Core//prelude/...
-// CHECK:STDOUT:   }
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: file {
-// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
-// CHECK:STDOUT:     .Core = imports.%Core
-// CHECK:STDOUT:     .Simple = %Simple.decl
-// CHECK:STDOUT:     .Function = %Function.decl
-// CHECK:STDOUT:   }
-// CHECK:STDOUT:   %Core.import = import Core
-// CHECK:STDOUT:   %Simple.decl: type = interface_decl @Simple [concrete = constants.%Simple.type] {} {}
-// CHECK:STDOUT:   %Function.decl: %Function.type = fn_decl @Function [concrete = constants.%Function] {} {}
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: interface @Simple {
-// CHECK:STDOUT:   %Self: %Simple.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
-// CHECK:STDOUT:   %F.decl: %F.type.e2e = fn_decl @F.1 [concrete = constants.%F.df8] {} {}
-// CHECK:STDOUT:   %assoc0: %Simple.assoc_type = assoc_entity element0, %F.decl [concrete = constants.%assoc0]
-// CHECK:STDOUT:
-// CHECK:STDOUT: !members:
-// CHECK:STDOUT:   .Self = %Self
-// CHECK:STDOUT:   .F = %assoc0
-// CHECK:STDOUT:   witness = (%F.decl)
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: impl @impl: %Self.ref as %Simple.ref {
-// CHECK:STDOUT:   %F.decl: %F.type.bc7 = fn_decl @F.2 [concrete = constants.%F.0a2] {} {}
-// CHECK:STDOUT:
-// CHECK:STDOUT: !members:
-// CHECK:STDOUT:   .F = %F.decl
-// CHECK:STDOUT:   witness = <error>
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: generic fn @F.1(@Simple.%Self: %Simple.type) {
-// CHECK:STDOUT:   fn();
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: fn @Function() {
-// CHECK:STDOUT: !entry:
-// CHECK:STDOUT:   impl_decl @impl [concrete] {} {
-// CHECK:STDOUT:     %Self.ref: type = name_ref Self, <error> [concrete = <error>]
-// CHECK:STDOUT:     %Simple.ref: type = name_ref Simple, file.%Simple.decl [concrete = constants.%Simple.type]
-// CHECK:STDOUT:   }
-// CHECK:STDOUT:   return
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: fn @F.2() {
-// CHECK:STDOUT: !entry:
-// CHECK:STDOUT:   return
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: specific @F.1(constants.%Self) {}
-// CHECK:STDOUT: