Remove python-pip from jenkins_jobs.

It's in jenkins_master already, and jenkins_jobs runs on jenkins_master.
At some point remind me to kick someone at puppetlabs in the pants for
thinking this restriction is useful.

Change-Id: I04d197c7e02573ae9319f5839269663f6d583b16

modules/jenkins_jobs/manifests/init.pp

@@ -31,10 +31,6 @@ class jenkins_jobs($site, $projects) {
       ]
   }
 
-  package { "python-pip":
-    ensure => present
-  }
-
   package { "python-jenkins":
     ensure => latest,
     provider => pip,