Back out "Fix definition of folly::remainder for android"

Summary: Original commit changeset: 149b780350bf

Reviewed By: zaxy78

Differential Revision: D26222637

fbshipit-source-id: 29bc017be6619165cbd497c27c7843fd95e345b1

folly/portability/Math.h

@@ -73,7 +73,6 @@ inline long double nextafter(long double x, long double y) {
  * Implement it using builtin versions
  */
 #ifdef __UCLIBC__
-
 constexpr float remainder(float x, float y) {
   return __builtin_remainderf(x, y);
 }
@@ -85,13 +84,6 @@ constexpr double remainder(double x, double y) {
 constexpr long double remainder(long double x, long double y) {
   return __builtin_remainderl(x, y);
 }
-
-#else
-
-// Fallback to STL if not uclibc.
-
-/* using override */ using std::remainder;
-
 #endif // __UCLIBC__
 
 #endif // !__ANDROID__ && !__UCLIBC__