[firebase-release] Removed change log and reset repo after 1.0.1 release

Author: firebase-ops

changelog.txt

@@ -1,6 +0,0 @@
-feature - Added ability to not require the display name in password sign up.
-feature - Pass login_hint when a user needs to sign in with Google using a specific email.
-fixed - Fixed account linking in recent versions of Firebase Auth.
-fixed - Fixed "operation not supported" error for password providers in Cordova environment.
-fixed - Display error when account lookup returns an unexpected error from the Auth backend.
-fixed - Added back button in sign in handler page.