Speed: Remove some optimizations that weren't optimizing (#6209)

## Summary

Simplify the TransformPane.

## Changes

- **What**: Remove the settling and culling composables. Gets rid of a
frequent event emission and some event handling addition/removals.

## Review Focus

In testing with a huge workflow in Vue mode, it was a lot faster without
these than with.
Can you check to see if you experience the same benefits?

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6209-Speed-Remove-some-optimizations-that-weren-t-optimizing-2946d73d3650815197a4df3c58a61575)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

packages/design-system/src/css/style.css

@@ -1315,15 +1315,6 @@ audio.comfy-audio.empty-audio-widget {
     font-size 0.1s ease;
 }
 
-/* Performance optimization during canvas interaction */
-.transform-pane--interacting .lg-node * {
-  transition: none !important;
-}
-
-.transform-pane--interacting .lg-node {
-  will-change: transform;
-}
-
 /* ===================== Mask Editor Styles ===================== */
 /* To be migrated to Tailwind later */
   #maskEditor_brush {