Removing 'stats' from JSON output formatter

This commit removes 'stats' from the JSON output formatter.  The
same information is available in the metrics section and
duplicating the data is pointless.

Closes-Bug: #1643723
Change-Id: Ia80a177fdc03c9769c35c824d8d907c93da2ebf7

bandit/formatters/json.py

@@ -68,21 +68,6 @@ This formatter outputs the issues in JSON.
           "test_name": "blacklist_calls",
           "test_id": "B301"
         }
-      ],
-      "stats": [
-        {
-          "filename": "examples/yaml_load.py",
-          "issue totals": {
-            "HIGH": 0,
-            "LOW": 0,
-            "MEDIUM": 1,
-            "UNDEFINED": 0
-          },
-          "score": {
-            "CONFIDENCE": 10,
-            "SEVERITY": 5
-          }
-        }
       ]
     }
 
@@ -99,9 +84,6 @@ import logging
 import operator
 import sys
 
-import six
-
-from bandit.core import constants
 from bandit.core import test_properties
 
 LOG = logging.getLogger(__name__)
@@ -118,31 +100,11 @@ def report(manager, fileobj, sev_level, conf_level, lines=-1):
     :param lines: Number of lines to report, -1 for all
     '''
 
-    stats = dict(zip(manager.files_list, manager.scores))
-    machine_output = dict({'results': [], 'errors': [], 'stats': []})
+    machine_output = dict({'results': [], 'errors': []})
     for (fname, reason) in manager.skipped:
         machine_output['errors'].append({'filename': fname,
                                          'reason': reason})
 
-    for filer, score in six.iteritems(stats):
-        totals = {}
-        rank = constants.RANKING
-        sev_idx = rank.index(sev_level)
-        for i in range(sev_idx, len(rank)):
-            severity = rank[i]
-            severity_value = constants.RANKING_VALUES[severity]
-            try:
-                sc = score['SEVERITY'][i] / severity_value
-            except ZeroDivisionError:
-                sc = 0
-            totals[severity] = sc
-
-        machine_output['stats'].append({
-            'filename': filer,
-            'score': {'SEVERITY': sum(i for i in score['SEVERITY']),
-                      'CONFIDENCE': sum(i for i in score['CONFIDENCE'])},
-            'issue totals': totals})
-
     results = manager.get_issue_list(sev_level=sev_level,
                                      conf_level=conf_level)
 

tests/unit/formatters/test_json.py

@@ -93,7 +93,4 @@ class JsonFormatterTests(testtools.TestCase):
             self.assertEqual(self.context['linerange'],
                              data['results'][0]['line_range'])
             self.assertEqual(self.check_name, data['results'][0]['test_name'])
-            self.assertEqual('binding.py', data['stats'][0]['filename'])
-            self.assertEqual({'CONFIDENCE': 0, 'SEVERITY': 0},
-                             data['stats'][0]['score'])
             self.assertIn('candidates', data['results'][0])