Remove non-Standard <hash_map> and <hash_set> (#5764)

Author: StephanTLavavej

stl/CMakeLists.txt

@@ -83,8 +83,6 @@ set(HEADERS
     ${CMAKE_CURRENT_LIST_DIR}/inc/functional
     ${CMAKE_CURRENT_LIST_DIR}/inc/future
     ${CMAKE_CURRENT_LIST_DIR}/inc/generator
-    ${CMAKE_CURRENT_LIST_DIR}/inc/hash_map
-    ${CMAKE_CURRENT_LIST_DIR}/inc/hash_set
     ${CMAKE_CURRENT_LIST_DIR}/inc/header-units.json
     ${CMAKE_CURRENT_LIST_DIR}/inc/initializer_list
     ${CMAKE_CURRENT_LIST_DIR}/inc/iomanip

stl/inc/__msvc_all_public_headers.hpp

@@ -30,7 +30,6 @@
 
 #define _SILENCE_CXX20_CISO646_REMOVED_WARNING
 #define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING
-#define _SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS
 
 // Core STL Headers
 #include <bit>
@@ -90,8 +89,6 @@
 #include <fstream>
 #include <functional>
 #include <generator>
-#include <hash_map>
-#include <hash_set>
 #include <iomanip>
 #include <ios>
 #include <iosfwd>