Removed unused variable

platform/windows/os_windows.cpp

@@ -1629,7 +1629,6 @@ Error OS_Windows::close_dynamic_library(void *p_library_handle) {
 }
 
 Error OS_Windows::get_dynamic_library_symbol_handle(void *p_library_handle, const String p_name, void *&p_symbol_handle, bool p_optional) {
-	char *error;
 	p_symbol_handle = (void *)GetProcAddress((HMODULE)p_library_handle, p_name.utf8().get_data());
 	if (!p_symbol_handle) {
 		if (!p_optional) {