Remove unused mips workarounds.

This was never really finished, and hasn't been supported for years.

Test: treehugger
Change-Id: I7668088d1449f33025aaf36fae0817894c84a877
diff --git a/core/java_renderscript.mk b/core/java_renderscript.mk
index 672863b..bfcf59e 100644
--- a/core/java_renderscript.mk
+++ b/core/java_renderscript.mk
@@ -129,7 +129,7 @@
 endif
 
 my_arch := $(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)
-ifneq (,$(filter arm64 mips64 x86_64,$(my_arch)))
+ifneq (,$(filter arm64 x86_64,$(my_arch)))
   my_min_sdk_version := 21
 else
   my_min_sdk_version := $(MIN_SUPPORTED_SDK_VERSION)