Remove unused method - we allow users to override runner parameters and make them immutable / set a default value inside action parameters.
Remove unused method - we allow users to override runner parameters and make
them immutable / set a default value inside action parameters.

Conflicts:
	st2api/st2api/controllers/v1/actions.py

peak6/st2,nzlosh/st2,tonybaloney/st2,punalpatel/st2,emedvedev/st2,dennybaa/st2,Plexxi/st2,emedvedev/st2,Plexxi/st2,pixelrebel/st2,dennybaa/st2,lakshmi-kannan/st2,tonybaloney/st2,peak6/st2,StackStorm/st2,nzlosh/st2,Itxaka/st2,armab/st2,lakshmi-kannan/st2,nzlosh/st2,alfasin/st2,StackStorm/st2,peak6/st2,pixelrebel/st2,pixelrebel/st2,dennybaa/st2,nzlosh/st2,armab/st2,tonybaloney/st2,Itxaka/st2,alfasin/st2,punalpatel/st2,StackStorm/st2,armab/st2,Itxaka/st2,Plexxi/st2,Plexxi/st2,punalpatel/st2,lakshmi-kannan/st2,alfasin/st2,StackStorm/st2,emedvedev/st2