Remove unnecessary format literals from error message.

Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/20646

Differential Revision: D15394795

fbshipit-source-id: 8033cf03341244b2b6a119e3c59f48ee6fe959cc
diff --git a/c10/cuda/CUDACachingAllocator.cpp b/c10/cuda/CUDACachingAllocator.cpp
index f03ba43..aec0605 100644
--- a/c10/cuda/CUDACachingAllocator.cpp
+++ b/c10/cuda/CUDACachingAllocator.cpp
@@ -338,7 +338,7 @@
     std::lock_guard<std::recursive_mutex> lock(mutex);
     Block* block = find_allocated_block(ptr);
     if (!block) {
-      AT_ERROR("invalid device pointer: %p", ptr);
+      AT_ERROR("invalid device pointer: ", ptr);
     }
     while (block->prev) {
       block = block->prev;
@@ -381,7 +381,7 @@
     std::lock_guard<std::recursive_mutex> lock(mutex);
     Block* block = find_allocated_block(ptr);
     if (!block) {
-      AT_ERROR("invalid device pointer: %p", ptr);
+      AT_ERROR("invalid device pointer: ", ptr);
     }
     if (stream.stream() == block->stream) {
       // ignore uses on the allocation stream, since those don't require any