Don't attempt to install overcommit on hook run

There are multiple edge cases where this doesn't work, and I don't want
to figure them out right now. Also, the installer doesn't currently
install files that already exist, so this will not do what you expect.

Remove it for now.

Change-Id: Ic58d053f3524de3b57825425891ec1da30ce7d3e
Reviewed-on: http://gerrit.causes.com/35689
Reviewed-by: Shane da Silva <shane@causes.com>
Tested-by: Shane da Silva <shane@causes.com>

Author: Shane da Silva

template-dir/hooks/overcommit-hook

@@ -49,10 +49,6 @@ if Gem::Version.new(Overcommit::VERSION) < Gem::Version.new('0.6.0')
 end
 
 begin
-  # Ensure this script and all symlinks are always up-to-date (it's cheap to do)
-  Overcommit::Installer.new(Overcommit::Logger.silent).
-                        run(Overcommit::Utils.repo_root, :action => :install)
-
   config = Overcommit::ConfigurationLoader.load_repo_config
 
   context = Overcommit::HookContext.create(hook_type, config, ARGV, STDIN)