Remove unnecessary control flow code in HookRunner

We changed the code around in this file in c590b31 but accidentally left
this code in, which was unnecessary. Remove it.

Change-Id: I68c6db25d18f92e5b4b467b8d7031d09b6b00530
Reviewed-on: http://gerrit.causes.com/40458
Reviewed-by: Shane da Silva <shane.dasilva@brigade.com>
Tested-by: jenkins <jenkins@causes.com>