fix：1、修复bug 2、删除不用的代码和资源，sdk等

Assets/Firebase/Editor/AppDependencies.xml

@@ -1,24 +0,0 @@
-<!-- Copyright (C) 2019 Google Inc. All Rights Reserved.
-
-FirebaseApp iOS and Android Dependencies.
--->
-
-<dependencies>
-  <iosPods>
-    <iosPod name="Firebase/Core" version="12.2.0" minTargetSdk="15.0">
-    </iosPod>
-  </iosPods>
-  <androidPackages>
-    <androidPackage spec="com.google.firebase:firebase-common:22.0.0">
-    </androidPackage>
-    <androidPackage spec="com.google.firebase:firebase-analytics:23.0.0">
-    </androidPackage>
-    <androidPackage spec="com.google.android.gms:play-services-base:18.7.2">
-    </androidPackage>
-    <androidPackage spec="com.google.firebase:firebase-app-unity:13.2.0">
-      <repositories>
-        <repository>Assets/Firebase/m2repository</repository>
-      </repositories>
-    </androidPackage>
-  </androidPackages>
-</dependencies>