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-rw-r--r--src/core/support/sync_posix.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/src/core/support/sync_posix.c b/src/core/support/sync_posix.c
index a28a4c6bf4..94fc1b0bec 100644
--- a/src/core/support/sync_posix.c
+++ b/src/core/support/sync_posix.c
@@ -31,13 +31,6 @@
*
*/
-/* Posix gpr synchroization support code. */
-
-#if !defined _POSIX_C_SOURCE || _POSIX_C_SOURCE < 199309L
-#undef _POSIX_C_SOURCE
-#define _POSIX_C_SOURCE 199309L
-#endif
-
#include <grpc/support/port_platform.h>
#ifdef GPR_POSIX_SYNC