Remove angle_perftests testing/buildbot exception

Prefer to configure directly when possible.

TBR=bsheedy

Bug: 1140626
Change-Id: I083b48a520f2dc2def0986793096b40e898b9bad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2490384Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819400}

testing/buildbot/test_suite_exceptions.pyl

@@ -75,13 +75,6 @@
     },
   },
   'angle_perftests': {
-    'modifications': {
-     'Android FYI 64 Perf (Pixel 2)': { # crbug.com/1140626
-       'swarming': {
-         'shards': 4,
-       },
-     },
-    },
     'remove_from': [
       'Android FYI Release (Nexus 5)',  # crbug.com/915429
       'Android FYI Release (Nexus 6)',  # anglebug.com/2433

testing/buildbot/test_suites.pyl

@@ -2031,7 +2031,7 @@
           'script': '//tools/perf/process_perf_results.py',
         },
         'android_swarming': {
-          'shards': 3,
+          'shards': 4,
         },
       },
     },