Remove Xenial instrumented libraries from DEPS

The Xenial instrumented libraries are no longer used and can be removed.

Bug: chromium:1260217
Change-Id: If3e7cb97f8e6d1b1b482e43885b215d5b199333e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/294640
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39376}
diff --git a/DEPS b/DEPS
index a1d0b0b..2c59464 100644
--- a/DEPS
+++ b/DEPS
@@ -2620,30 +2620,6 @@
               ],
   },
   {
-    'name': 'msan_chained_origins_xenial',
-    'pattern': '.',
-    'condition': 'checkout_instrumented_libraries',
-    'action': [ 'python3',
-                'src/third_party/depot_tools/download_from_google_storage.py',
-                '--no_resume',
-                '--no_auth',
-                '--bucket', 'chromium-instrumented-libraries',
-                '-s', 'src/third_party/instrumented_libraries/binaries/msan-chained-origins-xenial.tgz.sha1',
-              ],
-  },
-  {
-    'name': 'msan_no_origins_xenial',
-    'pattern': '.',
-    'condition': 'checkout_instrumented_libraries',
-    'action': [ 'python3',
-                'src/third_party/depot_tools/download_from_google_storage.py',
-                '--no_resume',
-                '--no_auth',
-                '--bucket', 'chromium-instrumented-libraries',
-                '-s', 'src/third_party/instrumented_libraries/binaries/msan-no-origins-xenial.tgz.sha1',
-              ],
-  },
-  {
     # Download test resources, i.e. video and audio files from Google Storage.
     'pattern': '.',
     'action': ['download_from_google_storage',