Remove duplicate es-MX entry from Xcode knownRegions.

Co-authored-by: Cursor <cursoragent@cursor.com>

meetings_app.xcodeproj/project.pbxproj

@@ -108,7 +108,6 @@
 				ru,
 				"zh-Hans",
 				"zh-Hant",
-				"es-MX",
 			);
 			mainGroup = 13AF5D992F83DE22001BE867;
 			minimizedProjectReferenceProxies = 1;