Remove remaining MIPS support.

With the exception of dwarf support in libelffile.

Test: aosp_taimen-userdebug boots.
Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 147346243
Change-Id: Ib25acbc98aa7f63ce49a7ed2f81a4a64d48eac39
diff --git a/build/Android.common.mk b/build/Android.common.mk
index e96e3ed..4d702e4 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -17,7 +17,7 @@
 ifndef ART_ANDROID_COMMON_MK
 ART_ANDROID_COMMON_MK = true
 
-ART_TARGET_SUPPORTED_ARCH := arm arm64 mips mips64 x86 x86_64
+ART_TARGET_SUPPORTED_ARCH := arm arm64 x86 x86_64
 ART_HOST_SUPPORTED_ARCH := x86 x86_64
 ART_DEXPREOPT_BOOT_JAR_DIR := system/framework