support/dependencies: don't check for `which'

It's requirement has been removed in previous commit.

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

support/dependencies/dependencies.sh

@@ -65,8 +65,6 @@ check_prog_host()
 	fi
 }
 
-# Verify that which is installed
-check_prog_host "which"
 # Verify that sed is installed
 check_prog_host "sed"