Remove MIPS support

tools/gyp/configurations_make.gypi

Index: tools/gyp/configurations_make.gypi
diff --git a/tools/gyp/configurations_make.gypi b/tools/gyp/configurations_make.gypi
index 93d08114addfa1669c61a5a4c41f1e7fe98941d7..523dfab6672610b748149060eae38718c6456c82 100644
--- a/tools/gyp/configurations_make.gypi
+++ b/tools/gyp/configurations_make.gypi
@@ -257,91 +257,6 @@
         ],
       },
 
-      'Dart_Linux_simmips_Base': {
-        'abstract': 1,
-        'cflags': [
-          '-O3',
-          '-m32',
-          '-msse2',
-          '-mfpmath=sse',
-        ],
-        'ldflags': [
-          '-m32',
-        ],
-      },
-
-      # MIPS cross-build
-      'Dart_Linux_xmips_Base': {
-        'abstract': 1,
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'cflags': [
-              '-EL',
-              '-march=mips32',
-              '-mhard-float',
-              '-fno-strict-overflow',
-            ],
-            'ldflags': [
-              '-EL',
-            ],
-          }],
-          ['_toolset=="host"',{
-            'cflags': [
-              '-O3',
-              '-m32',
-              '-msse2',
-              '-mfpmath=sse',
-            ],
-            'ldflags': [
-              '-m32',
-            ],
-        }]]
-      },
-
-      # These flags are needed for tcmalloc to be able to collect stack traces
-      # for heap profiling on mips.
-      'Dart_Linux_xmips_Debug': {
-        'abstract': 1,
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'cflags!': [
-              '-fno-exceptions',
-            ],
-            'cflags': [
-              '-fexceptions',
-              '-funwind-tables',
-            ],
-          }],
-        ],
-      },
-
-      # These flags are needed for tcmalloc to be able to collect stack traces
-      # for heap profiling on mips.
-      'Dart_Linux_xmips_Release': {
-        'abstract': 1,
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'cflags!': [
-              '-fno-exceptions',
-            ],
-            'cflags': [
-              '-fexceptions',
-              '-funwind-tables',
-            ],
-          }],
-        ],
-      },
-
-      # MIPS native build
-      'Dart_Linux_mips_Base': {
-        'abstract': 1,
-        'cflags': [
-          '-march=mips32',
-          '-mhard-float',
-          '-fno-strict-overflow',
-        ],
-      },
-
       'Dart_Linux_Debug': {
         'abstract': 1,
         'cflags': [