Remove MIPS support

runtime/platform/globals.h

Index: runtime/platform/globals.h
diff --git a/runtime/platform/globals.h b/runtime/platform/globals.h
index 148343e229a4df81e88b22af9b832bdeadfc0aa9..9cb44dde4510118b288a90cbb1dcfe828cde9cd2 100644
--- a/runtime/platform/globals.h
+++ b/runtime/platform/globals.h
@@ -212,13 +212,8 @@ typedef simd128_value_t fpu_register_t;
 #elif defined(_M_IX86) || defined(__i386__)
 #define HOST_ARCH_IA32 1
 #define ARCH_IS_32_BIT 1
-#if defined(TARGET_ARCH_MIPS)
-#define kFpuRegisterSize 8
-typedef double fpu_register_t;
-#else
 #define kFpuRegisterSize 16
 typedef simd128_value_t fpu_register_t;
-#endif
 #elif defined(__ARMEL__)
 #define HOST_ARCH_ARM 1
 #define ARCH_IS_32_BIT 1
@@ -241,14 +236,6 @@ typedef simd_value_t fpu_register_t;
     reinterpret_cast<simd_value_t*>(addr)->data_[3] = value.data_[3];          \
   } while (0)
 
-#elif defined(__MIPSEL__)
-#define HOST_ARCH_MIPS 1
-#define ARCH_IS_32_BIT 1
-#define kFpuRegisterSize 8
-typedef double fpu_register_t;
-#elif defined(__MIPSEB__)
-#error Big-endian MIPS is not supported by Dart. Try passing -EL to your      \
- compiler.
 #elif defined(__aarch64__)
 #define HOST_ARCH_ARM64 1
 #define ARCH_IS_64_BIT 1
@@ -308,13 +295,11 @@ typedef simd128_value_t fpu_register_t;
 #error Automatic compiler detection failed.
 #endif
 
-#if !defined(TARGET_ARCH_MIPS) && !defined(TARGET_ARCH_ARM) &&                 \
-    !defined(TARGET_ARCH_X64) && !defined(TARGET_ARCH_IA32) &&                 \
-    !defined(TARGET_ARCH_ARM64) && !defined(TARGET_ARCH_DBC)
+#if !defined(TARGET_ARCH_ARM) && !defined(TARGET_ARCH_X64) &&                  \
+    !defined(TARGET_ARCH_IA32) && !defined(TARGET_ARCH_ARM64) &&               \
+    !defined(TARGET_ARCH_DBC)
 // No target architecture specified pick the one matching the host architecture.
-#if defined(HOST_ARCH_MIPS)
-#define TARGET_ARCH_MIPS 1
-#elif defined(HOST_ARCH_ARM)
+#if defined(HOST_ARCH_ARM)
 #define TARGET_ARCH_ARM 1
 #elif defined(HOST_ARCH_X64)
 #define TARGET_ARCH_X64 1
@@ -333,8 +318,7 @@ typedef simd128_value_t fpu_register_t;
 #if !defined(ARCH_IS_64_BIT)
 #error Mismatched Host/Target architectures.
 #endif
-#elif defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_ARM) ||                 \
-    defined(TARGET_ARCH_MIPS)
+#elif defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_ARM)
 #if !defined(ARCH_IS_32_BIT)
 #error Mismatched Host/Target architectures.
 #endif
@@ -355,11 +339,6 @@ typedef simd128_value_t fpu_register_t;
 #define USING_SIMULATOR 1
 #endif
 
-#elif defined(TARGET_ARCH_MIPS)
-#if !defined(HOST_ARCH_MIPS)
-#define USING_SIMULATOR 1
-#endif
-
 #elif defined(TARGET_ARCH_DBC)
 #define USING_SIMULATOR 1