Remove unnecessary label for KnownContextValues.ts.

The correct label for the NetworkDependencyTree insight is already
present in the list (as 'long-critical-network-tree').

Bug: 425273273
Change-Id: I7a967bb16529e197d4342c4e0aee0905be94c625
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6917100
Commit-Queue: Finnur Thorarinsson <[email protected]>
Auto-Submit: Finnur Thorarinsson <[email protected]>
Commit-Queue: Connor Clark <[email protected]>
Reviewed-by: Connor Clark <[email protected]>

Author: finnurbreki

front_end/ui/visual_logging/KnownContextValues.ts

@@ -3800,7 +3800,6 @@ export const knownContextValues = new Set([
   'timeline.insight-ask-ai.legacy-javascript',
   'timeline.insight-ask-ai.long-critical-network-tree',
   'timeline.insight-ask-ai.modern-http',
-  'timeline.insight-ask-ai.network-dependency-tree',
   'timeline.insight-ask-ai.render-blocking-requests',
   'timeline.insight-ask-ai.slow-css-selector',
   'timeline.insight-ask-ai.third-parties',