Remove deprecated experiments documentation page (#2243)

* Initial plan

* Remove old experiments documentation page

Co-authored-by: junhouse <[email protected]>

* Fix build error by removing experiments reference from _meta.ts

Co-authored-by: junhouse <[email protected]>

* Add build artifacts to .gitignore

Co-authored-by: junhouse <[email protected]>

* Restore robots.txt and update .gitignore

Co-authored-by: junhouse <[email protected]>

* Remove sitemap.xml from .gitignore

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: junhouse <[email protected]>
Co-authored-by: KyungJun Kim <[email protected]>

Author: Copilot

pages/docs/reports/apps.mdx

@@ -3,7 +3,6 @@ import { Cards } from 'nextra/components'
 # Other Apps
 
 <Cards>
-  <Cards.Card icon title="Experiments (OLD)" href="/docs/reports/apps/experiments" />
   <Cards.Card icon title="Impact" href="/docs/reports/apps/impact" />
   <Cards.Card icon title="JQL" href="/docs/reports/apps/jql" />
   <Cards.Card icon title="Signal" href="/docs/reports/apps/signal" />

pages/docs/reports/apps/_meta.ts

@@ -1,5 +1,4 @@
 export default {
-    "experiments": "Experiments [OLD]",
     "impact": "Impact",
     "signal": "Signal",
     "jql": "JQL"