Revert "ffdc: Added -e option to enable dump specific functions"

This reverts commit ab741df3.

ffdc -e option is no longer used by dump manager and it
is replaced by dreport.

Change-Id: I8a0c5f8627fa87571541b578711fc91bdd0ff4b8
Signed-off-by: Jayanth Othayoth <ojayanth@in.ibm.com>