[refactor] Remove obsolete Kontext Edit Button (#5108)

* feat: Remove obsolete Kontext Edit Button

Removes the 'Kontext Edit Button' and its associated code, as it has been made obsolete by the new 'Subgraphs + Partial Execution' feature.

Fixes #5093

* Update locales [skip ci]

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

src/locales/ko/commands.json

@@ -41,9 +41,6 @@
   "Comfy_BrowseTemplates": {
     "label": "템플릿 탐색"
   },
-  "Comfy_Canvas_AddEditModelStep": {
-    "label": "모델 편집 단계 추가"
-  },
   "Comfy_Canvas_DeleteSelectedItems": {
     "label": "선택한 항목 삭제"
   },

src/locales/ko/main.json

@@ -762,7 +762,6 @@
   },
   "menuLabels": {
     "About ComfyUI": "ComfyUI에 대하여",
-    "Add Edit Model Step": "모델 편집 단계 추가",
     "Bottom Panel": "하단 패널",
     "Browse Templates": "템플릿 탐색",
     "Bypass/Unbypass Selected Nodes": "선택한 노드 우회/우회 해제",