[NCCL][Test Only] test send/recv on OSS

Pull Request resolved: #45140

Test only
ghstack-source-id: 112604790

Differential Revision: [D23844388](https://our.internmc.facebook.com/intern/diff/D23844388/)

torch/lib/c10d/NCCLUtils.hpp

@@ -17,8 +17,6 @@
 #define ENABLE_NCCL_ERROR_CHECKING
 #endif
 
-// Fix build issues with NCCL P2P - until then disable NCCL send/recv.
-#if defined(ENABLE_NCCL_A2A) && (ENABLE_NCCL_A2A == 1)
 // P2P is enabled only for NCCL versions 2.7+ since ncclSend()
 // and ncclRecv() are not supported in earlier versions.
 #if defined(NCCL_MAJOR) && (NCCL_MAJOR == 2) && defined(NCCL_MINOR) && \
@@ -27,7 +25,6 @@
 #elif defined(NCCL_MAJOR) && (NCCL_MAJOR >= 3)
 #define ENABLE_NCCL_P2P_SUPPORT
 #endif
-#endif
 
 // Macro to throw on a non-successful NCCL return value.
 #define C10D_NCCL_CHECK(cmd)                                                 \