diff --git a/contrib/buildbot/server.py b/contrib/buildbot/server.py
--- a/contrib/buildbot/server.py
+++ b/contrib/buildbot/server.py
@@ -169,10 +169,6 @@
 
         if foundPRs > 0:
             phab.updateRevisionSummary(revisionId, newSummary)
-            commentMessage = ("[Bot Message]\n"
-                              "One or more PR numbers were detected in the summary.\n"
-                              "Links to those PRs have been inserted into the summary for reference.")
-            phab.commentOnRevision(revisionId, commentMessage)
 
         return SUCCESS, 200
 
diff --git a/contrib/buildbot/test/test_endpoint_backportcheck.py b/contrib/buildbot/test/test_endpoint_backportcheck.py
--- a/contrib/buildbot/test/test_endpoint_backportcheck.py
+++ b/contrib/buildbot/test/test_endpoint_backportcheck.py
@@ -117,11 +117,6 @@
             "```\nsecp256k1 PR456 in a multi-line code block\n```\n"
             "  secp256k1 PR456 in a code block using indentation\n"
             "Another secp backport [[https://github.com/bitcoin-core/secp256k1/pull/567 | PR567]]",
-        }], objectIdentifier='1234'), mock.call(transactions=[{
-            "type": "comment",
-            "value": "[Bot Message]\n"
-            "One or more PR numbers were detected in the summary.\n"
-            "Links to those PRs have been inserted into the summary for reference.",
         }], objectIdentifier='1234')]
         self.phab.differential.revision.edit.assert_has_calls(
             calls, any_order=True)