remove reference to linux-xenial-rel

Now this is the same with linux-rel and corresponding CI builder/tester.

I will remove recipes later.

Bug: 964197
Change-Id: I58e82885d341d4447523da33e5fa3450906438e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1616706
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660850}

infra/config/cr-buildbucket.cfg

@@ -1417,15 +1417,6 @@ buckets {
       mixins: "linux-ci"
     }
 
-    builders {
-      name: "linux-xenial-rel"
-      mixins: "goma-many-jobs-for-ci"
-      dimensions: "os:Ubuntu-16.04"
-      recipe {
-        properties: "mastername:chromium.linux"
-      }
-    }
-
     builders {
       name: "Linux Builder (dbg)"
       mixins: "linux-ci"
@@ -3774,13 +3765,6 @@ buckets {
       name: "linux-ozone-rel"
     }
     builders { mixins: "linux-try" name: "linux-trusty-webkit-msan-rel" }
-    builders {
-      dimensions: "os:Ubuntu-16.04"
-      recipe {
-        properties: "mastername:tryserver.chromium.linux"
-      }
-      name: "linux-xenial-rel"
-    }
     builders { mixins: "linux-try" name: "linux_arm" }
     builders { mixins: "linux-try" name: "linux_chromium_analysis" }
     builders { mixins: "linux-try" name: "linux_chromium_archive_rel_ng" }

infra/config/luci-milo.cfg

@@ -520,11 +520,6 @@ consoles {
     category: "chromium.linux|release"
     short_name: "gcc"
   }
-  builders {
-    name: "buildbucket/luci.chromium.ci/linux-xenial-rel"
-    category: "chromium.linux|release"
-    short_name: "xen"
-  }
   builders {
     name: "buildbucket/luci.chromium.ci/linux-jumbo-rel"
     category: "chromium.linux|release"
@@ -948,11 +943,6 @@ consoles {
     category: "release"
     short_name: "gcc"
   }
-  builders {
-    name: "buildbucket/luci.chromium.ci/linux-xenial-rel"
-    category: "release"
-    short_name: "xen"
-  }
   builders {
     name: "buildbucket/luci.chromium.ci/linux-jumbo-rel"
     category: "release"

infra/config/luci-scheduler.cfg

@@ -373,7 +373,6 @@ trigger {
   triggers: "linux-archive-rel"
   triggers: "linux-tcmalloc-rel"
   triggers: "linux-win_cross-rel"
-  triggers: "linux-xenial-rel"
   triggers: "mac-code-coverage-generation"
   triggers: "mac-archive-dbg"
   triggers: "mac-hermetic-upgrade-rel"
@@ -1868,16 +1867,6 @@ job {
   }
 }
 
-job {
-  id: "linux-xenial-rel"
-  acl_sets: "default"
-  buildbucket: {
-    server: "cr-buildbucket.appspot.com"
-    bucket: "luci.chromium.ci"
-    builder: "linux-xenial-rel"
-  }
-}
-
 job {
   id: "Linux ASan LSan Builder"
   acl_sets: "default"

testing/buildbot/test_suite_exceptions.pyl

@@ -1286,12 +1286,6 @@
           '--jobs=1',
         ],
       },
-      'linux-xenial-rel': {
-        'args': [
-          '--xvfb',
-          '--jobs=1',
-        ],
-      },
       # chromium.mac
       # Disable parallelism on all Mac bots.
       'Mac10.10 Tests': {

testing/buildbot/waterfalls.pyl

@@ -3441,23 +3441,6 @@
           'gtest_tests': 'ozone_linux_gtests',
         },
       },
-      'linux-xenial-rel': {
-        'swarming': {
-          'dimension_sets': [
-            {
-              'os': 'Ubuntu-16.04',
-            },
-          ],
-        },
-        'additional_compile_targets': [
-          'all',
-        ],
-        'test_suites': {
-          'gtest_tests': 'chromium_linux_gtests',
-          'isolated_scripts': 'chromium_linux_rel_isolated_scripts',
-          'scripts': 'chromium_linux_scripts',
-        },
-      },
     },
   },
   {

tools/mb/mb_config.pyl

@@ -447,7 +447,6 @@
       # for the jumbo part.
       'linux-jumbo-rel': 'gpu_tests_release_bot_jumbo_no_symbols_use_dummy_lastchange',
       'linux-ozone-rel': 'ozone_linux_release_bot',
-      'linux-xenial-rel': 'release_bot',
     },
 
     'chromium.lkgr': {
@@ -753,7 +752,6 @@
       'linux-ozone-rel': 'ozone_linux_release_trybot',
       'linux-rel': 'gpu_tests_release_trybot_no_symbols_use_dummy_lastchange',
       'linux-trusty-webkit-msan-rel': 'msan_release_bot',
-      'linux-xenial-rel': 'release_trybot',
       'linux_arm': 'release_trybot_arm',
       'linux_chromium_archive_rel_ng': 'release_bot',
       'linux_chromium_asan_rel_ng': 'asan_lsan_release_trybot',