Remove logging and metrics from builder alerts code

infra/services/builder_alerts/crbug_issues.py

Index: infra/services/builder_alerts/crbug_issues.py
diff --git a/infra/services/builder_alerts/crbug_issues.py b/infra/services/builder_alerts/crbug_issues.py
index e3eee1db7c169b5be4b4c2d955e959ffa688d6ee..c3966e7d2ea8f49afb686b0191aabce948f336f6 100644
--- a/infra/services/builder_alerts/crbug_issues.py
+++ b/infra/services/builder_alerts/crbug_issues.py
@@ -12,8 +12,6 @@ from apiclient.errors import HttpError
 import httplib2
 from oauth2client import client
 
-from infra_libs import ts_mon
-
 
 # Dictionary mapping whitelisted lower-case labels to corresponding tree names.
 WHITELISTED_LABELS = {'sheriff-chromium': 'chromium',
@@ -22,11 +20,6 @@ WHITELISTED_LABELS = {'sheriff-chromium': 'chromium',
 BATCH_SIZE = 10
 
 
-issue_tracker_requests = ts_mon.CounterMetric(
-    'flakiness_pipeline/issue_tracker_requests',
-    description='Number of requests to the issue tracker')
-
-
 def _build_crbug_service(crbug_service_account):  # pragma: no cover
   with open(crbug_service_account) as crbug_sa_file:
     service_account = json.load(crbug_sa_file)
@@ -51,9 +44,6 @@ def _list_issues(crbug_service_account):
           projectId='chromium', label=whitelisted_label,
           startIndex=start_index, maxResults=BATCH_SIZE, can='open')
       response = request.execute(num_retries=5)
-      issue_tracker_requests.increment(
-          {'source': 'builder_alerts', 'operation': 'issues_list'})
-      logging.debug('Incremented issue_tracker_requests counter')
   
       # Issue Tracker may omit certain issues occasionally, so counting whether
       # they add up to 'totalResults' in response is not relaible. However, we