Revert r10419, which added the half-functional feature for reading a config file from STDIN.  We no longer read config files from STDIN.
Revert r10419, which added the half-functional feature for reading a
config file from STDIN.  We no longer read config files from
STDIN.

* tools/hook-scripts/mailer/mailer.py: Revert r10419.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion