Remove incorrect test.

Symbol constructor can't be used to create symbols for private names.

Closes #34377
Closes #30848
#36433
#34904

Change-Id: Ibe551c43a9209e1f483cea8178665890d52799aa
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/108416
Reviewed-by: Vyacheslav Egorov <[email protected]>
Commit-Queue: Vyacheslav Egorov <[email protected]>

Author: mraleph

tests/language_2/language_2_analyzer.status

@@ -71,7 +71,6 @@ malformed2_test: Pass, MissingCompileTimeError # Flaky: issue 31056.
 mixin_method_override_test/01: MissingCompileTimeError
 mixin_super_2_test: CompileTimeError
 mixin_super_use_test: CompileTimeError
-mock_writable_final_private_field_test: CompileTimeError # failing-by-design, see Issue #34377
 nested_generic_closure_test: CompileTimeError # Issue #28515
 no_main_test/01: Fail # failing-by-design, the analyzer has no restriction that a library include a main function.
 no_such_constructor2_test: StaticWarning

tests/language_2/language_2_dart2js.status

@@ -160,7 +160,6 @@ mixin_illegal_superclass_test/29: MissingCompileTimeError
 mixin_illegal_superclass_test/30: MissingCompileTimeError
 mixin_method_override_test/G5: Skip # Issue 34354
 mock_writable_final_field_test: RuntimeError # Issue 30847
-mock_writable_final_private_field_test: RuntimeError # Issue 17526, 30847
 modulo_test: RuntimeError # non JS number semantics
 named_parameters_default_eq_test/none: RuntimeError
 nan_identical_test: RuntimeError # Issue 11551
@@ -455,7 +454,6 @@ mixin_mixin_bound_test: RuntimeError
 mixin_mixin_test: RuntimeError
 mixin_type_parameters_super_test: RuntimeError
 mock_writable_final_field_test: RuntimeError # Issue 30847
-mock_writable_final_private_field_test: RuntimeError # Issue 17526, 30847
 modulo_test: RuntimeError # non JS number semantics
 nan_identical_test: RuntimeError # Issue 11551
 no_main_test/01: CompileTimeError

tests/language_2/language_2_dartdevc.status

@@ -104,7 +104,6 @@ mixin_declaration/mixin_declaration_factory_test/02: Crash
 mixin_method_override_test/01: MissingCompileTimeError
 mixin_super_2_test: CompileTimeError # Issue 34806
 mixin_super_use_test: CompileTimeError # Issue 34806
-mock_writable_final_private_field_test: CompileTimeError # Issue 30848
 nested_generic_closure_test: CompileTimeError
 nnbd/*: Skip
 override_inheritance_field_test/42: CompileTimeError
@@ -245,7 +244,6 @@ mixin_illegal_superclass_test/29: MissingCompileTimeError
 mixin_illegal_superclass_test/30: MissingCompileTimeError
 mixin_super_2_test: RuntimeError # Issue 34807
 mixin_super_use_test: RuntimeError # Issue 34808
-mock_writable_final_private_field_test: RuntimeError
 multiline_newline_test/04: MissingCompileTimeError
 multiline_newline_test/04r: MissingCompileTimeError
 multiline_newline_test/05: MissingCompileTimeError

tests/language_2/language_2_kernel.status

@@ -1046,7 +1046,6 @@ redirecting_factory_reflection_test: RuntimeError
 generic_function_bounds_test: RuntimeError # Issue 32076
 
 [ $compiler == dartkb || $compiler == dartkp ]
-mock_writable_final_private_field_test: CompileTimeError # Test uses Symbol("_...") which is a compile-time error.
 set_literals/invalid_set_literal_test/29: Pass # Gen_kernel does does constant
 set_literals/invalid_set_literal_test/30: Pass # evalutation, so these tests
 set_literals/invalid_set_literal_test/31: Pass # throw the expected errors. The