Remove sample keys from weaved.conf

BUG:25627281
Change-Id: I27e780849ca05b1856b6f9e896c6757766e919e3

weaved.conf

@@ -15,13 +15,13 @@
 #
 
 # OAuth 2.0 client id.
-client_id=58855907228.apps.googleusercontent.com
+# client_id=
 
 # OAuth 2.0 client secret.
-client_secret=eHSAREAHrIqPsHBxCE9zPPBi
+# client_secret=
 
 # OAuth 2.0 API key.
-api_key=AIzaSyDSq46gG-AxUnC3zoqD9COIPrjolFsMfMA
+# api_key=
 
 # Human readable name of the device.
 name=Brillo Starter Board (Qualcomm)