Remove job parameters from status.json

They don't have anything particularly sensitive now, but they might
in the future, and they can be quite large (thus making status.json
large).

Since the zuul client command uses the same data, remove the
parameters column from its output.

Change-Id: I681c576a25012a6fb0733f468778576d6003c088

tests/test_scheduler.py

@@ -3072,7 +3072,6 @@ For CI problems and help debugging, contact ci@example.org"""
                 self.assertEqual('project-merge', job['name'])
                 self.assertEqual('gate', job['pipeline'])
                 self.assertEqual(False, job['retry'])
-                self.assertEqual(13, len(job['parameters']))
                 self.assertEqual('https://server/job/project-merge/0/',
                                  job['url'])
                 self.assertEqual(7, len(job['worker']))

zuul/cmd/client.py

@@ -232,9 +232,6 @@ class Client(zuul.cmd.ZuulApp):
             'number': {
                 'title': 'Number'
             },
-            'parameters': {
-                'title': 'Parameters'
-            },
             'worker.name': {
                 'title': 'Worker'
             },

zuul/model.py

@@ -780,7 +780,6 @@ class QueueItem(object):
                 'canceled': build.canceled if build else None,
                 'retry': build.retry if build else None,
                 'number': build.number if build else None,
-                'parameters': build.parameters if build else None,
                 'worker': worker
             })