webadmin: isRemoveCommandAvailable() - removal of unneeded booleans

isRemoveCommandAvailable() is storing the checks results into booleans
and checks them all at each iteration.
The booleans can be replaced with comments and we can return immediately
when the result is known.

Change-Id: I808275fb826e2d4fd154e87aa9730f4c57b53002
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1131845
Signed-off-by: Liron Aravot <laravot@redhat.com>