Remove TODOs from the test of a declared but not defined struct as a by value parameter/return value (#5708)

These TODOs should have been removed in
https://github.com/carbon-language/carbon-lang/pull/5538 which adds
support for struct by value parameters and return values.

Part of #5533.

toolchain/check/testdata/interop/cpp/function/struct.carbon

@@ -27,8 +27,6 @@ library "[[@TEST_NAME]]";
 import Cpp library "decl_value_param_type.h";
 
 fn F() {
-  //@dump-sem-ir-begin
-  // TODO: This should fail on the fact `S` is declared and not defined.
   // CHECK:STDERR: fail_todo_import_decl_value_param_type.carbon:[[@LINE+14]]:3: error: semantics TODO: `Unsupported: Record declarations without a definition` [SemanticsTodo]
   // CHECK:STDERR:   Cpp.foo({});
   // CHECK:STDERR:   ^~~~~~~
@@ -44,7 +42,6 @@ fn F() {
   // CHECK:STDERR:   ^~~~~~~
   // CHECK:STDERR:
   Cpp.foo({});
-  //@dump-sem-ir-end
 }
 
 // ============================================================================
@@ -288,8 +285,6 @@ library "[[@TEST_NAME]]";
 import Cpp library "decl_value_return_type.h";
 
 fn F() {
-  //@dump-sem-ir-begin
-  // TODO: This should fail on the fact `S` is declared and not defined.
   // CHECK:STDERR: fail_todo_import_decl_value_return_type.carbon:[[@LINE+14]]:3: error: semantics TODO: `Unsupported: Record declarations without a definition` [SemanticsTodo]
   // CHECK:STDERR:   Cpp.foo();
   // CHECK:STDERR:   ^~~~~~~
@@ -305,7 +300,6 @@ fn F() {
   // CHECK:STDERR:   ^~~~~~~
   // CHECK:STDERR:
   Cpp.foo();
-  //@dump-sem-ir-end
 }
 
 // ============================================================================
@@ -388,28 +382,6 @@ fn F() {
   //@dump-sem-ir-end
 }
 
-// CHECK:STDOUT: --- fail_todo_import_decl_value_param_type.carbon
-// CHECK:STDOUT:
-// CHECK:STDOUT: constants {
-// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: imports {
-// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
-// CHECK:STDOUT:     .foo = <error>
-// CHECK:STDOUT:     .S = <error>
-// CHECK:STDOUT:     import Cpp//...
-// CHECK:STDOUT:   }
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: fn @F() {
-// CHECK:STDOUT: !entry:
-// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
-// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
-// CHECK:STDOUT:   %.loc23: %empty_struct_type = struct_literal ()
-// CHECK:STDOUT:   <elided>
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: --- import_definition_no_data_members_value_param_type.carbon
 // CHECK:STDOUT:
 // CHECK:STDOUT: constants {
@@ -744,26 +716,6 @@ fn F() {
 // CHECK:STDOUT:   <elided>
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
-// CHECK:STDOUT: --- fail_todo_import_decl_value_return_type.carbon
-// CHECK:STDOUT:
-// CHECK:STDOUT: constants {
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: imports {
-// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
-// CHECK:STDOUT:     .foo = <error>
-// CHECK:STDOUT:     .S = <error>
-// CHECK:STDOUT:     import Cpp//...
-// CHECK:STDOUT:   }
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
-// CHECK:STDOUT: fn @F() {
-// CHECK:STDOUT: !entry:
-// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
-// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
-// CHECK:STDOUT:   <elided>
-// CHECK:STDOUT: }
-// CHECK:STDOUT:
 // CHECK:STDOUT: --- import_definition_value_return_type.carbon
 // CHECK:STDOUT:
 // CHECK:STDOUT: constants {