Rely on the platform -std default.

Bug: http://b/32019064
Test: builds
Change-Id: I17611b6d9598992bd52cf3dc93509f0f5e0bdcde
diff --git a/native/dicttoolkit/Android.mk b/native/dicttoolkit/Android.mk
index 118682d..4befecf 100644
--- a/native/dicttoolkit/Android.mk
+++ b/native/dicttoolkit/Android.mk
@@ -36,7 +36,7 @@
 
 # To suppress compiler warnings for unused variables/functions used for debug features etc.
 LOCAL_CFLAGS += -Wno-unused-parameter -Wno-unused-function
-LOCAL_CFLAGS += -std=c++11 -Wno-unused-parameter -Wno-unused-function
+LOCAL_CFLAGS += -Wno-unused-parameter -Wno-unused-function
 
 include $(LOCAL_PATH)/NativeFileList.mk
 include $(LATIN_IME_CORE_PATH)/NativeFileList.mk