rfc1: don't allow self-commits to documentation

Problem: RFC 1 allows maintainers to commit their own documentation
changes, which contradicts current project practice.

Drop this bullet.  We treat documentation like code.

Author: garlick

spec_1.rst

@@ -164,8 +164,6 @@ Development Process
 
 -  Maintainers SHOULD ask for improvements to incorrect patches and SHOULD reject incorrect patches if the Contributor does not respond constructively.
 
--  Maintainers MAY commit changes to non-source documentation directly to the project.
-
 -  Autotools products, if applicable, SHOULD NOT be checked into the project
    revision control system