Revert "Initial support for clique-based kernels (#276)" (#280)

This reverts commit d68a532bc6.

[ROCm/rccl commit: 84a2541e01]

projects/rccl/src/enqueue.cc

@@ -617,31 +617,6 @@ end:
         info->opName, info->comm->opCount, info->sendbuff, info->recvbuff, info->count,
         info->datatype, info->op, info->root, info->comm, info->comm->nRanks, info->stream);
 
-    // [RCCL] Alternative launch path for clique-based kernels (if supported and enabled)
-    {
-      if (info->comm->cliqueManager->IsSupported(info->coll,
-                                                 info->count,
-                                                 info->datatype,
-                                                 info->op))
-      {
-        // Declare the input / output pointers being used (to exchange via IPC with other ranks)
-        NCCLCHECK(info->comm->cliqueManager->DeclarePointers(info->comm->opCount,
-                                                             info->sendbuff,
-                                                             info->recvbuff));
-
-        // Queue the clique-based kernel
-        NCCLCHECK(info->comm->cliqueManager->QueueKernel(info->comm->opCount,
-                                                         info->coll,
-                                                         info->count,
-                                                         info->datatype,
-                                                         info->op,
-                                                         info->root,
-                                                         info->stream));
-        return ncclSuccess;
-      }
-    }
-    // [/RCCL]
-
     NCCLCHECK(ncclSaveKernel(info));
     NCCLCHECK(ncclBarrierEnqueue(info->comm));
     NCCLCHECK(ncclBarrierEnqueueWait(info->comm));