remove unused deser code for Expires in non-s3 services (#3168)

Author: lucix-aws

.changelog/fbff8b722c5f4bd98378060aff441db2.json

@@ -73,7 +73,9 @@ public Model preprocessModel(Model model, GoSettings settings) {
 
     @Override
     public void writeAdditionalFiles(GoSettings settings, Model model, SymbolProvider symbolProvider, GoDelegator goDelegator) {
-        goDelegator.useFileWriter("deserializers.go", settings.getModuleName(), deserializeS3Expires());
+        if (isServiceS3(model, settings.getService(model))) {
+            goDelegator.useFileWriter("deserializers.go", settings.getModuleName(), deserializeS3Expires());
+        }
     }
 
     private Shape addExpiresString(Shape shape) {