Remove palmer from XML OWNERS.

Bug: None
Change-Id: I6e7cf363acd3c1730440481089d2059bc2c5b460
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3104567
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Joey Arhar <jarhar@chromium.org>
Commit-Queue: Chris Palmer <palmer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#913499}
NOKEYCHECK=True
GitOrigin-RevId: 84530824d5eda6a1eb5e17c8c2b3833458a6b0c1
diff --git a/OWNERS b/OWNERS
index a15eaa2..5715f80 100644
--- a/OWNERS
+++ b/OWNERS
@@ -2,4 +2,3 @@
 # a CL to add yourself here.
 dcheng@chromium.org
 schenney@chromium.org
-palmer@chromium.org