Revert "Request MANAGE_EXTERNAL_STORAGE permission"

This reverts commit 349b2c11e91260ff5d6a6e55355722fad09626ea.

Reason for revert: This change was already made in aosp/1205113 and now Shell requests the permission twice.

Change-Id: Ice5522d7095f9b0dbc96c2ff31a976bfdd942c5a
diff --git a/packages/Shell/AndroidManifest.xml b/packages/Shell/AndroidManifest.xml
index 14c7795..af2569d 100644
--- a/packages/Shell/AndroidManifest.xml
+++ b/packages/Shell/AndroidManifest.xml
@@ -108,7 +108,6 @@
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WRITE_MEDIA_STORAGE" />
-    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS" />
     <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS_FULL" />
     <uses-permission android:name="android.permission.CREATE_USERS" />