[tools/perf] Delete unused variable

tools/perf/measurements/rasterize_and_record_micro.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import time
 
 from telemetry.core import exceptions
 from telemetry.page import page_test
 from telemetry.value import scalar
 
@@ skipping 11 matching lines @@
     self._report_detailed_results = report_detailed_results
 
   def CustomizeBrowserOptions(self, options):
     options.AppendExtraBrowserArgs([
         '--enable-impl-side-painting',
         '--enable-threaded-compositing',
         '--enable-gpu-benchmarking'
     ])
 
   def ValidateAndMeasurePage(self, page, tab, results):
+    del page  # unused
     try:
       tab.WaitForDocumentReadyStateToBeComplete()
     except exceptions.TimeoutException:
       pass
     time.sleep(self._start_wait_time)
 
     # Enqueue benchmark
     tab.ExecuteJavaScript("""
         window.benchmark_results = {};
         window.benchmark_results.done = false;
@@ skipping 103 matching lines @@
           results.current_page, 'total_layers', 'count', total_layers))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_picture_layers', 'count',
           total_picture_layers))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_picture_layers_with_no_content', 'count',
           total_picture_layers_with_no_content))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_picture_layers_off_screen', 'count',
           total_picture_layers_off_screen))