[PCv2] Remove tracing categories only needed for old TTFMP implementation

tools/perf/benchmarks/page_cycler_v2.py

 # Copyright 2016 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.
 
 """The page cycler v2.
 
 For details, see design doc:
 https://docs.google.com/document/d/1EZQX-x3eEphXupiX-Hq7T4Afju5_sIdxPWYetj7ynd0
 """
 
@@ skipping 14 matching lines @@
 
     # "blink.console" is used for marking ranges in
     # cache_temperature.MarkTelemetryInternal.
     cat_filter.AddIncludedCategory('blink.console')
 
     # "navigation" and "blink.user_timing" are needed to capture core
     # navigation events.
     cat_filter.AddIncludedCategory('navigation')
     cat_filter.AddIncludedCategory('blink.user_timing')
 
-    # Below categories are needed for first-meaningful-paint computation.
-    cat_filter.AddDisabledByDefault('disabled-by-default-blink.debug.layout')
-    cat_filter.AddIncludedCategory('devtools.timeline')
+    # "loading" is needed for first-meaningful-paint computation.
     cat_filter.AddIncludedCategory('loading')
 
     # "toplevel" category is used to capture TaskQueueManager events
     # necessary to compute time-to-interactive.
     cat_filter.AddIncludedCategory('toplevel')
 
     tbm_options = timeline_based_measurement.Options(
         overhead_level=cat_filter)
     tbm_options.SetTimelineBasedMetrics(['loadingMetric'])
     return tbm_options
@@ skipping 162 matching lines @@
   set, without running in out-of-process iframes mode.. """
   page_set = page_sets.OopifBasicPageSet
 
   @classmethod
   def Name(cls):
     return 'page_cycler_v2.basic_oopif'
 
   def CreateStorySet(self, options):
     return page_sets.OopifBasicPageSet(cache_temperatures=[
           cache_temperature.PCV1_COLD, cache_temperature.PCV1_WARM])