[PyTorch] Remove unused sstream/string includes from c10/macros/Macros.h

Pull Request resolved: #83353

Nothing in the rest of the header seems to use these.
ghstack-source-id: 164665336

Differential Revision: [D38672680](https://our.internmc.facebook.com/intern/diff/D38672680/)

Author: swolchok

aten/src/ATen/Parallel.h

@@ -2,6 +2,7 @@
 #include <ATen/Config.h>
 #include <c10/macros/Macros.h>
 #include <functional>
+#include <string>
 
 namespace at {
 

c10/macros/Macros.h

@@ -243,8 +243,7 @@ using namespace c10::hip;
 #define C10_FALLTHROUGH
 #endif
 
-#include <sstream>
-#include <string>
+#include <cstdint>
 
 #ifdef __HIPCC__
 // Unlike CUDA, HIP requires a HIP header to be included for __host__ to work.

c10/util/SmallVector.cpp

@@ -17,6 +17,7 @@
 #include <c10/util/SmallVector.h>
 #include <cstdint>
 #include <stdexcept>
+#include <string>
 using namespace c10;
 
 // Check that no bytes are wasted and everything is well-aligned.

c10/util/SmallVector.h

@@ -35,6 +35,7 @@
 #include <limits>
 #include <memory>
 #include <new>
+#include <ostream>
 #include <type_traits>
 #include <utility>