fix：1、修复bug 2、删除不用的代码和资源，sdk等

Assets/Firebase/Plugins/iOS/Firebase.App.pdb.meta

@@ -1,81 +0,0 @@
-fileFormatVersion: 2
-guid: e96748f6edd2467b95622dee98523c65
-labels:
-- gvh
-- gvh_version-13.2.0
-- gvhp_exportpath-Firebase/Plugins/iOS/Firebase.App.pdb
-timeCreated: 1480838400
-PluginImporter:
-  serializedVersion: 1
-  iconMap: {}
-  executionOrder: {}
-  isPreloaded: 0
-  platformData:
-    Android:
-      enabled: 0
-      settings:
-        CPU: AnyCPU
-    Any:
-      enabled: 0
-      settings: {}
-    Editor:
-      enabled: 0
-      settings:
-        CPU: AnyCPU
-        DefaultValueInitialized: true
-        OS: AnyOS
-    Linux:
-      enabled: 0
-      settings:
-        CPU: None
-    Linux64:
-      enabled: 0
-      settings:
-        CPU: None
-    LinuxUniversal:
-      enabled: 0
-      settings:
-        CPU: None
-    OSXIntel:
-      enabled: 0
-      settings:
-        CPU: None
-    OSXIntel64:
-      enabled: 0
-      settings:
-        CPU: None
-    OSXUniversal:
-      enabled: 0
-      settings:
-        CPU: None
-    Web:
-      enabled: 0
-      settings: {}
-    WebStreamed:
-      enabled: 0
-      settings: {}
-    Win:
-      enabled: 0
-      settings:
-        CPU: None
-    Win64:
-      enabled: 0
-      settings:
-        CPU: None
-    WindowsStoreApps:
-      enabled: 0
-      settings:
-        CPU: AnyCPU
-    iOS:
-      enabled: 1
-      settings:
-        CompileFlags:
-        FrameworkDependencies:
-    tvOS:
-      enabled: 1
-      settings:
-        CompileFlags:
-        FrameworkDependencies:
-  userData:
-  assetBundleName:
-  assetBundleVariant: