Remove CFI-related WAR that is no longer necessary

Bug: http://b/33678192

Clang has been updated past the revision mentioned in the work around.
So this is no longer necessary.

Test: Build
Change-Id: I08f8e75936bbc3527abc86ba4ce0f2c10382d332
diff --git a/core/config_sanitizers.mk b/core/config_sanitizers.mk
index 79604ac..fce0b5a 100644
--- a/core/config_sanitizers.mk
+++ b/core/config_sanitizers.mk
@@ -242,11 +242,6 @@
   endif
   my_ldflags += $(CFI_EXTRA_LDFLAGS)
   my_arflags += --plugin $(LLVM_PREBUILTS_PATH)/../lib64/LLVMgold.so
-  # Workaround for b/33678192. CFI jumptables need Thumb2 codegen.  Revert when
-  # Clang is updated past r290384.
-  ifneq ($(filter arm,$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)),)
-    my_ldflags += -march=armv7-a
-  endif
 
   ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
         my_ldflags := $(filter-out -fsanitize-cfi-cross-dso,$(my_ldflags))