Remove MIPS support

tests/language/language.status

Index: tests/language/language.status
diff --git a/tests/language/language.status b/tests/language/language.status
index efa57092b677c0b9c37c3128eab565c198586c39..843b8fab5791737452b3e3d7f6e3bb998991de95 100644
--- a/tests/language/language.status
+++ b/tests/language/language.status
@@ -137,16 +137,13 @@ 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.
 
 [ $compiler == none && ($runtime == dartium || $runtime == drt) && $mode == debug ]
 large_class_declaration_test: SkipSlow # Times out. Issue 20352
 
-[ ($runtime == vm || $runtime == dart_precompiled) && ( $arch == simarm || $arch == arm || $arch == simarmv6 || $arch == armv6 || $arch == simarmv5te || $arch == armv5te || $arch == simarm64 || $arch == arm64 || $arch == simmips || $arch == mips) ]
+[ ($runtime == vm || $runtime == dart_precompiled) && ( $arch == simarm || $arch == arm || $arch == simarmv6 || $arch == armv6 || $arch == simarmv5te || $arch == armv5te || $arch == simarm64 || $arch == arm64) ]
 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