Remove -std=c++11 as it is enabled by default now

Change-Id: I53edb2f3d281d78c0301474d65e60f86cc6ff363
diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index afb32d1..c1372bd 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -34,9 +34,6 @@
 # To suppress compiler warnings for unused variables/functions used for debug features etc.
 LOCAL_CFLAGS += -Wno-unused-parameter -Wno-unused-function
 
-# For C++11
-LOCAL_CFLAGS += -std=c++11
-
 include $(LOCAL_PATH)/NativeFileList.mk
 
 LOCAL_SRC_FILES := \