Drop components_browsertests from TotAndroidASan's test suite

It hasn't run successfully in ages, and our bot seems to be the only one
running it under ASan on Android.

Bug: 908832
Change-Id: I12270a54ac34c659669b38a0f6639757bea89a48
Reviewed-on: https://chromium-review.googlesource.com/c/1350906Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611289}

testing/buildbot/chromium.clang.json

@@ -6726,15 +6726,6 @@
           "can_use_on_swarming_builders": false
         },
         "test": "base_unittests"
-      },
-      {
-        "args": [
-          "--tool=asan"
-        ],
-        "swarming": {
-          "can_use_on_swarming_builders": false
-        },
-        "test": "components_browsertests"
       }
     ],
     "junit_tests": [

testing/buildbot/test_suites.pyl

@@ -527,11 +527,6 @@
           '--tool=asan',
         ],
       },
-      'components_browsertests': {
-        'args': [
-          '--tool=asan',
-        ],
-      },
     },
 
     'chromium_android_asan_junit_tests': {