Update Jackalope to remove references to RVM.

Starting with Firmware 1.6 and the Metasploit tools package, RVM will no longer be needed.

payloads/library/credentials/Jackalope/payload.txt

@@ -26,8 +26,6 @@ COUNT=$((COUNT+1))
 LOOTDIR=$LOOTBASE/$TARGET_HOSTNAME-$COUNT
 mkdir -p $LOOTDIR
 
-source /etc/profile.d/rvm.sh
-rvm --default use 2.6.2 >> $LOOTDIR/log.txt
 MSF_DIR=/tools/metasploit-framework
 
 # Save environment informaiton:
@@ -115,4 +113,4 @@ do
 	else
 		ENTER_PW
 	fi
-done
+done