Don't explicitly disable the C++1y-extensions warning in ForEach-inl and WhenN-inl

Summary: We are fully on C++14 now, so these warnings should never be firing.

Reviewed By: yfeldblum

Differential Revision: D5179124

fbshipit-source-id: 31c6ddbce5c45b60fe73990f49d65ac95d17fe87

folly/fibers/ForEach-inl.h

@@ -49,10 +49,6 @@ inline void forEach(InputIterator first, InputIterator last, F&& f) {
   std::exception_ptr e;
   Baton baton;
 
-#ifdef __clang__
-#pragma clang diagnostic push // ignore generalized lambda capture warning
-#pragma clang diagnostic ignored "-Wc++1y-extensions"
-#endif
   auto taskFunc = [&tasksTodo, &e, &f, &baton](size_t id, FuncType&& func) {
     return [
       id,
@@ -72,9 +68,6 @@ inline void forEach(InputIterator first, InputIterator last, F&& f) {
       }
     };
   };
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
 
   auto firstTask = first;
   ++first;

folly/fibers/WhenN-inl.h

@@ -53,10 +53,6 @@ collectN(InputIterator first, InputIterator last, size_t n) {
   await([first, last, context](Promise<void> promise) mutable {
     context->promise = std::move(promise);
     for (size_t i = 0; first != last; ++i, ++first) {
-#ifdef __clang__
-#pragma clang diagnostic push // ignore generalized lambda capture warning
-#pragma clang diagnostic ignored "-Wc++1y-extensions"
-#endif
       addTask([ i, context, f = std::move(*first) ]() {
         try {
           auto result = f();
@@ -74,9 +70,6 @@ collectN(InputIterator first, InputIterator last, size_t n) {
           context->promise->setValue();
         }
       });
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
     }
   });
 
@@ -114,10 +107,6 @@ collectN(InputIterator first, InputIterator last, size_t n) {
   await([first, last, context](Promise<void> promise) mutable {
     context->promise = std::move(promise);
     for (size_t i = 0; first != last; ++i, ++first) {
-#ifdef __clang__
-#pragma clang diagnostic push // ignore generalized lambda capture warning
-#pragma clang diagnostic ignored "-Wc++1y-extensions"
-#endif
       addTask([ i, context, f = std::move(*first) ]() {
         try {
           f();
@@ -135,9 +124,6 @@ collectN(InputIterator first, InputIterator last, size_t n) {
           context->promise->setValue();
         }
       });
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
     }
   });