[FAB-3158] CORE_PEER_COMMITTER_LEDGER_ORDERER not valid

CORE_PEER_COMMITTER_LEDGER_ORDERER is no longer a
valid parameter and while commented out in the
e2e_cli Docker Compose files, it leads to confusion.

Additionally, I found that there are leftover docs
from the sfhackfest / preview release which still
show up in search and contain this variable and
even worse outdated commands.  This change also
deletes those file as well

Change-Id: I18e66c7cde460631a65a3ac26c0ad5875ef33b36
Signed-off-by: Gari Singh <[email protected]>

Author: mastersingh24