Remove MIPS support

runtime/vm/profiler.cc

Index: runtime/vm/profiler.cc
diff --git a/runtime/vm/profiler.cc b/runtime/vm/profiler.cc
index a7c3f0e9ee78cfa3e08659766c16c0674659b122..da856e2844ba9f3dd8efcd6f961407a9533460b5 100644
--- a/runtime/vm/profiler.cc
+++ b/runtime/vm/profiler.cc
@@ -32,7 +32,7 @@ static const intptr_t kMaxSamplesPerTick = 4;
 DEFINE_FLAG(bool, trace_profiled_isolates, false, "Trace profiled isolates.");
 
 #if defined(HOST_OS_ANDROID) || defined(TARGET_ARCH_ARM64) ||                  \
-    defined(TARGET_ARCH_ARM) || defined(TARGET_ARCH_MIPS)
+    defined(TARGET_ARCH_ARM)
 DEFINE_FLAG(int,
             profile_period,
             10000,
@@ -288,11 +288,6 @@ bool ReturnAddressLocator::LocateReturnAddress(uword* return_address) {
   ASSERT(return_address != NULL);
   return false;
 }
-#elif defined(TARGET_ARCH_MIPS)
-bool ReturnAddressLocator::LocateReturnAddress(uword* return_address) {
-  ASSERT(return_address != NULL);
-  return false;
-}
 #elif defined(TARGET_ARCH_DBC)
 bool ReturnAddressLocator::LocateReturnAddress(uword* return_address) {
   ASSERT(return_address != NULL);