Remove unnecessary warning suppressions in test cmake file

Author: MBalszun

test/CMakeLists.txt

@@ -87,11 +87,9 @@ if(MSVC)
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
     endif()
 
-    # Disable warning C4389: '==': signed/unsigned mismatch
-	# Disable warning C4309: 'static_cast': truncation of constant value
 	# Disable warning C4566: character represented by universal-character-name '\uFF01' cannot be represented in the current code page (1252)
 	# Disable warning C4996: 'nlohmann::basic_json<std::map,std::vector,std::string,bool,int64_t,uint64_t,double,std::allocator,nlohmann::adl_serializer>::operator <<': was declared deprecated
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4389 /wd4309 /wd4566 /wd4996")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4566 /wd4996")
 
 	# https://github.com/nlohmann/json/issues/1114
 	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /bigobj")