Removes test code of Graph in the panel

package.json

@@ -13068,15 +13068,6 @@
 			"gitlensPanel": [
 				{
 					"type": "webview",
-					"id": "gitlens.views.graph",
-					"name": "Commit Graph",
-					"when": "!gitlens:disabled && gitlens:plus:enabled",
-					"contextualTitle": "GitLens",
-					"icon": "$(gitlens-graph)",
-					"visibility": "visible"
-				},
-				{
-					"type": "webview",
 					"id": "gitlens.views.timeline",
 					"name": "Visual File History",
 					"when": "!gitlens:disabled && gitlens:plus:enabled",