Remove terminal override for tree workspace (#15471)

## Description

For some cases (ex: Terminal menu-> new) vscode prompts me for which
place I want to create a terminal when I make a new terminal in the
workspace.

As is, if I pick tree2, it puts the terminal at the repo root, and if I
pick fluid-framework it puts the terminal 3 directories above the repo
root.

With this change it behaves as expected.

experimental/dds/tree2/.vscode/Tree.code-workspace

@@ -9,7 +9,5 @@
 			"path": ".."
 		}
 	],
-	"settings": {
-		"terminal.integrated.cwd": "../../.."
-	}
+	"settings": {}
 }