chore(i18n): remove unused translation keys

Author: hannesrudolph

webview-ui/src/i18n/locales/ca/settings.json

@@ -497,7 +497,6 @@
 				"label": "Maximum diagnostic messages",
 				"description": "Maximum number of diagnostic messages to include per file. This limit applies to both automatic inclusion (when checkbox is enabled) and manual @problems mentions. Higher values provide more context but increase token usage.",
 				"resetTooltip": "Reset to default value (50)",
-				"unlimited": "Unlimited diagnostic messages",
 				"unlimitedLabel": "Unlimited",
 				"unlimitedDescription": "All diagnostic messages will be included. Use with caution as this may significantly increase token usage."
 			}