Modify logging for windows exception handler and remove unused function (#3489)

ps.
https://github.com/bytecodealliance/wasm-micro-runtime/issues/3416
https://github.com/bytecodealliance/wasm-micro-runtime/issues/3400

core/iwasm/common/gc/gc_type.c

@@ -846,12 +846,6 @@ wasm_is_reftype_supers_of_func(uint8 type)
     return (type == REF_TYPE_FUNCREF) ? true : false;
 }
 
-inline static bool
-wasm_is_reftype_supers_of_extern(uint8 type)
-{
-    return (type == REF_TYPE_EXTERNREF) ? true : false;
-}
-
 #if WASM_ENABLE_STRINGREF != 0
 inline static bool
 wasm_is_reftype_supers_of_string(uint8 type)

core/iwasm/common/wasm_runtime_common.c

@@ -384,12 +384,14 @@ runtime_exception_handler(EXCEPTION_POINTERS *exce_info)
                 return ret;
         }
 #endif
+        else {
+            LOG_WARNING("Unhandled exception thrown:  exception code: 0x%lx, "
+                        "exception address: %p, exception information: %p\n",
+                        ExceptionRecord->ExceptionCode,
+                        ExceptionRecord->ExceptionAddress, sig_addr);
+        }
     }
 
-    LOG_ERROR("Unhandled exception thrown:  exception code: 0x%lx, "
-              "exception address: %p, exception information: %p\n",
-              ExceptionRecord->ExceptionCode, ExceptionRecord->ExceptionAddress,
-              sig_addr);
     return EXCEPTION_CONTINUE_SEARCH;
 }
 #endif /* end of BH_PLATFORM_WINDOWS */