docs: remove redundant release note for Network tab

Author: muhammadkamel

packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md

@@ -45,9 +45,6 @@ TODO: Remove this section if there are not any updates.
 * Fixed an issue where the Network tab would stop capturing new HTTP requests
   after pressing Clear while recording. -
   [#9856](https://github.com/flutter/devtools/pull/9856)
-* Fixed an issue where the Network tab search field was disabled after pressing
-  Clear while recording. -
-  [#9856](https://github.com/flutter/devtools/pull/9856)
 
 ## Logging updates