Elimina el plugin Redmine Git Hosting

Finalmente se descarta por los problemas de configuración y potencial
brecha de seguridad al requerir acceso global al puerto ssh.

plugins/redmine_git_hosting/contrib/hooks/post-receive/mail_notifications.py

@@ -1,35 +0,0 @@
-#! /usr/bin/env python
-
-import sys
-import os
-
-import git_multimail
-
-
-# It is possible to modify the output templates here; e.g.:
-
-git_multimail.FOOTER_TEMPLATE = """\
-
--- \n\
-This email was generated by the wonderful git-multimail tool from JBox Web.
-"""
-
-
-# Specify which "git config" section contains the configuration for
-# git-multimail:
-config = git_multimail.Config('multimailhook')
-
-# check if hook is enabled
-enabled = config.get_bool('enabled')
-
-if enabled:
-  # Select the type of environment:
-  environment = git_multimail.GitoliteEnvironment(config=config)
-
-  # Choose the method of sending emails based on the git config:
-  mailer = git_multimail.choose_mailer(config, environment)
-
-  # Read changes from stdin and send notification emails:
-  git_multimail.run_as_post_receive_hook(environment, mailer)
-else:
-  print("    multimailhook is disabled")