Revert "Reland "Add libfuzzer_tests to chromium.fyi Clang ToT testers (w/ and w/o ASan) on Linux.""

This reverts commit 7e5cda7a.

Reason for revert:
The test is failing. See e.g.
https://build.chromium.org/p/chromium.fyi/builders/ClangToTLinux%20tester/builds/2976

Before re-enabling on the ToT Clang bots, please have the test enabled
and passing on regular buildbots, including the CQ.

This also removes the test from the Clang bots from the new chromium.clang waterfall.

Original change's description:
> Reland "Add libfuzzer_tests to chromium.fyi Clang ToT testers (w/ and w/o ASan) on Linux."
> 
> Bug: 764514
> 
> Original CL: https://chromium-review.googlesource.com/679619
> 
> R=​dpranke@chromium.org
> 
> Change-Id: I412ac11cbe2c73de9e7b724e2689a97144aad47e
> Reviewed-on: https://chromium-review.googlesource.com/688029
> Reviewed-by: Oliver Chang <ochang@chromium.org>
> Reviewed-by: Dirk Pranke <dpranke@chromium.org>
> Commit-Queue: Max Moroz <mmoroz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#505167}

TBR=dpranke@chromium.org,ochang@chromium.org,mmoroz@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 764514,765859
Change-Id: I7af22d752dfcc48c580a7a704d02b2b5a065da1b
Reviewed-on: https://chromium-review.googlesource.com/701424
Commit-Queue: Hans Wennborg <hans@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Reviewed-by: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506759}

testing/buildbot/chromium.clang.json

@@ -201,12 +201,6 @@
         },
         "test": "jingle_unittests"
       },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "libfuzzer_tests"
-      },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
@@ -550,12 +544,6 @@
         },
         "test": "jingle_unittests"
       },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "libfuzzer_tests"
-      },
       {
         "swarming": {
           "can_use_on_swarming_builders": true

testing/buildbot/chromium.fyi.json

@@ -3493,12 +3493,6 @@
         },
         "test": "jingle_unittests"
       },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "libfuzzer_tests"
-      },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
@@ -3828,12 +3822,6 @@
         },
         "test": "jingle_unittests"
       },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "libfuzzer_tests"
-      },
       {
         "swarming": {
           "can_use_on_swarming_builders": true

testing/buildbot/gn_isolate_map.pyl

@@ -670,10 +670,6 @@
     "label": "//components/leveldb:leveldb_service_unittests",
     "type": "console_test_launcher",
   },
-  "libfuzzer_tests": {
-    "label": "//testing/libfuzzer/tests:libfuzzer_tests",
-    "type": "console_test_launcher",
-  },
   "libjingle_xmpp_unittests": {
     "label": "//third_party/libjingle_xmpp:libjingle_xmpp_unittests",
     "type": "console_test_launcher",