Remove CI votes metric

This patch removes processing of CI votes. The reasons are:
 * CI votes rely on DriverLog database which is deprecated
 * CI votes are collected from comments to patch sets, querying
   comments significantly increases the load on Gerrit
 * CI votes are not actively used by community
 * CI votes provide only partial look into state of third-party
   drivers.

This reverts commits:
   a6ff499de3
   1b6a5fe764
   03be2b4e19
   94f371d543
   5ad1cbe79c

Change-Id: Ie30b68c54b8d6fac6330481bf83bd1b2c4bfa190

stackalytics/dashboard/decorators.py

@@ -321,28 +321,6 @@ def mark_finalize(record):
     return new_record
 
 
-def ci_filter(result, record, param_id, context):
-    result_by_param = result[getattr(record, param_id)]
-
-    result_by_param['metric'] += 1
-
-    key = 'success' if record.value else 'failure'
-    result_by_param[key] = result_by_param.get(key, 0) + 1
-
-
-def ci_finalize(record):
-    new_record = record.copy()
-
-    metric = record.get('metric')
-    if metric:
-        new_record['success_ratio'] = '%.1f%%' % (
-            (record.get('success', 0) * 100.0) / metric)
-    else:
-        new_record['success_rate'] = helpers.INFINITY_HTML
-
-    return new_record
-
-
 def person_day_filter(result, record, param_id, context):
     day = utils.timestamp_to_day(record.date)
     # fact that record-days are grouped by days in some order is used
@@ -389,7 +367,6 @@ def aggregate_filter():
                 'resolved-bugs': (incremental_filter, None),
                 'members': (incremental_filter, None),
                 'person-day': (person_day_filter, None),
-                'ci': (ci_filter, ci_finalize),
                 'patches': (None, None),
                 'translations': (loc_filter, None),
             }