Removed should not use patch to create rule

We have had this rule for some time and it doesn't align with current
resolutions and direction for the specification/WG.

[[
5.8.1 LDP servers should not allow clients to create new resources using
PATCH. POST (to an LDPC) and/or PUT should be used as the standard way to
create new LDPRs.
]]

I have removed this as we already have reference to RFC5789 [2] which
already highlights the possibility for PATCH supporting resource create
depending on the underlying patch model and supporting format.  Since we
don't have this yet, it would seem unnecessary to make any claims here that
it should or should not be done.

[1] - https://dvcs.w3.org/hg/ldpwg/raw-file/default/ldp.html#ldpr-HTTP_PATCH
[2] - https://tools.ietf.org/html/rfc5789

- Steve Speicher