[test] Remove dart2js tests of MirrorsUsed. Remove MirrorsUsed annotations for all tests.

Remove tests using both dart:mirrors and dart:html.

Bug: dart-lang/sdk#40045
Change-Id: Ib0fcaab497fee6c18460199ae2db18451408b015
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/132740
Reviewed-by: Ben Konyi <bkonyi@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>

Author: rmacnak-google

tests/lib/lib_kernel.status

@@ -55,8 +55,6 @@ isolate/issue_21398_parent_isolate2_test/01: Skip # Times out. Deferred loading
 isolate/static_function_test: Skip # Times out. Issue 31855. CompileTimeError. Issue 31402
 mirrors/invocation_fuzz_test: Crash
 mirrors/metadata_allowed_values_test/16: Skip # Flaky, crashes.
-mirrors/mirrors_used*: SkipByDesign # Invalid tests. MirrorsUsed does not have a specification, and dart:mirrors is not required to hide declarations that are not covered by any MirrorsUsed annotation.
-mirrors/native_class_test: SkipByDesign # Imports dart:html
 
 [ $hot_reload_rollback && ($compiler == dartk || $compiler == dartkb) ]
 isolate/illegal_msg_function_test: Skip # Timeout

tests/lib/lib_vm.status

@@ -32,8 +32,6 @@ mirrors/generic_interface_test/01: MissingCompileTimeError
 mirrors/generics_test/01: MissingCompileTimeError
 mirrors/initializing_formals_test/01: Fail # initializing formals are implicitly final as of Dart 1.21
 mirrors/metadata_nested_constructor_call_test/none: CompileTimeError
-mirrors/mirrors_used*: SkipByDesign # Invalid tests. MirrorsUsed does not have a specification, and dart:mirrors is not required to hide declarations that are not covered by any MirrorsUsed annotation.
-mirrors/native_class_test: SkipByDesign # Imports dart:html
 mirrors/redirecting_factory_different_type_test/01: MissingCompileTimeError
 mirrors/redirecting_factory_test/01: RuntimeError
 mirrors/redirecting_factory_test/none: RuntimeError