Remove last usages of cxx_library.

Reviewed By: mzlee

Differential Revision: D6632262

fbshipit-source-id: 1ec3ba232e573b9cbc892f23827f9a7c5df34106

Author: ttsugriy

ReactAndroid/DEFS

@@ -108,10 +108,6 @@ def rn_robolectric_test(name, srcs, vm_args = None, *args, **kwargs):
     vm_args = vm_args + extra_vm_args,
     *args, **kwargs)
 
-original_cxx_library = cxx_library
-def cxx_library(allow_jni_merging=None, **kwargs):
-    original_cxx_library(**kwargs)
 
-
-def fb_xplat_cxx_library(*args, **kwargs):
+def fb_xplat_cxx_library(allow_jni_merging=None, **kwargs):
     cxx_library(*args, **kwargs)