fix: custom agent metadata

Author: chagong

.github/agents/issuelens.agent.md

@@ -2,10 +2,6 @@
 name: issuelens
 description: "An agent specialized in Java Tooling (IDE, extensions, build tools, language servers) area, responsible for commenting and labeling on GitHub issues. Use when: triaging issues, labeling issues, analyzing Java tooling bugs."
 tools: ['github/*', 'execute', 'read', 'search', 'web', 'javatooling-search/*']
-mcp-servers:
-  javatooling-search:
-    type: http
-    url: ${{ secrets.JAVATOOLING_INDEX_URL }}
 ---
 
 # IssueLens — Java Tooling Issue Triage Agent