Remove duplicate entry.

Bug: none
Change-Id: I2f1254e685befc8de3526c91ffe266bd36d26307
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4351709
Reviewed-by: Alex Gough <ajgo@chromium.org>
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Alex Gough <ajgo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1119126}
NOKEYCHECK=True
GitOrigin-RevId: 9107289be1af3dc250dfc058aaaf0922232663d5
diff --git a/src/BUILD.gn b/src/BUILD.gn
index 4b3bbaf..75928d5 100644
--- a/src/BUILD.gn
+++ b/src/BUILD.gn
@@ -273,7 +273,6 @@
     "ipcz/message_macros/message_listener_definition_macros.h",
     "ipcz/message_macros/message_listener_dispatch_macros.h",
     "ipcz/message_macros/message_params_declaration_macros.h",
-    "ipcz/message_macros/message_params_declaration_macros.h",
     "ipcz/message_macros/undef_message_macros.h",
     "ipcz/node.cc",
     "ipcz/node_connector.cc",