Remove MIPS support

tests/language/language.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This directory contains tests that are intended to show the
 # current state of the language.
 
 [ $strong ]
 *: SkipByDesign # tests/language_strong has the strong mode versions of these tests.
 
@@ skipping 126 matching lines @@
 
 [ $compiler == none && $runtime == dartium && $system == linux && $arch != x64 ]
 issue_22780_test/01: Pass, Timeout # Issue 24473
 
 [ $compiler == none && $runtime == dartium && $system == linux && $arch == x64 ]
 async_await_test: Skip # Issue 26198
 
 [ $compiler == none && $runtime == drt ]
 disassemble_test: Pass, Fail # Issue 18122
 
-[ ($runtime == vm || $runtime == dart_precompiled) && $arch == mips && $mode == debug ]
-large_class_declaration_test: SkipSlow # Times out. Issue 20352
-
 [ ($runtime == vm || $runtime == flutter || $runtime == dart_precompiled) && $arch == arm64 ]
 large_class_declaration_test: SkipSlow # Uses too much memory.
 closure_cycles_test: Pass, Slow
 
 [ $compiler == none && ($runtime == dartium || $runtime == drt) && $mode == debug ]
 large_class_declaration_test: SkipSlow # Times out. Issue 20352
 
-[ ($runtime == vm || $runtime == dart_precompiled) && ($arch == simmips || $arch == mips) ]
+[ $runtime == vm || $runtime == dart_precompiled ]
 vm/load_to_load_unaligned_forwarding_vm_test: Pass, Crash # Unaligned offset. Issue 22151
 vm/unaligned_float_access_literal_index_test: Pass, Crash # Unaligned offset. Issue 22151
 vm/unaligned_float_access_literal_index_test: Pass, Crash # Unaligned offset. Issue 22151
 
-
 [ $compiler == none && ($runtime == dartium || $runtime == drt) ]
 issue23244_test: Fail # Issue 23244
 
 [ ($compiler == none || $compiler == precompiler || $compiler == app_jit) && (($runtime == vm || $runtime == dart_precompiled) || $runtime == drt || $runtime == dartium) && $arch == ia32 ]
 vm/regress_24517_test: Pass, Fail # Issue 24517.
 
 [ $compiler == precompiler && $runtime == dart_precompiled ]
 vm/regress_27671_test: Skip # Unsupported
 export_double_same_main_test: Skip # Issue 29895
 export_ambiguous_main_negative_test: Skip # Issue 29895
@@ skipping 401 matching lines @@
 async_return_types_test/wrongTypeParameter: Skip # Flutter Issue 9110
 async_return_types_test/wrongReturnType: Skip # Flutter Issue 9110
 async_return_types_test/return_value_sync_star: Skip # Flutter Issue 9110
 asyncstar_yield_test: Skip # Flutter Issue 9110
 async_star_no_cancel_test: Skip # Flutter Issue 9110
 async_star_cancel_while_paused_test: Skip # Flutter Issue 9110
 await_for_test: Skip # Flutter Issue 9110
 await_for_cancel_test: Skip # Flutter Issue 9110