Revert "Make scap restart HHVM"

This reverts commit ecbbf47cf09e5ad8f0da32e16072ea6eb1bb5ba6.

Folks are working on fixes for the 503 storm in our startup 
scripts and/or pybal setup but for now it's really just a 
pain in the butt that we don't have to have in Beta.

Bug: 72366
Change-Id: Ic4574b7fed679434097be28c061927ac459a86fc