Update UPGRADES.rst

UPGRADE.rst

-Upgrading to vx.xx
-==================
+Upgrading to v0.8.0
+===================
 
 Servers which use captchas will need to add their public key to::
 
@@ -12,9 +12,6 @@ Servers which use captchas will need to add their public key to::
 This is required in order to support registration fallback (typically used on
 mobile devices).
 
-The format of stored application services has changed in Synapse. You will need
-to run ``PYTHONPATH=. python scripts/upgrade_appservice_db.py <database file path>``
-to convert to the new format.
 
 Upgrading to v0.7.0
 ===================