Fix lint

Author: ericholscher

readthedocs/doc_builder/exceptions.py

@@ -62,7 +62,6 @@ class BuildUserSkip(BuildUserError):
     message = gettext_noop("This build was manually skipped using a command exit code.")
     state = BUILD_STATE_CANCELLED
 
-
 class ProjectBuildsSkippedError(BuildUserError):
     message = gettext_noop('Builds for this project are temporarily disabled')