fix: remove machine-specific temp folder from workspace fixture

Agent-Logs-Url: https://github.com/advanced-security/codeql-development-mcp-server/sessions/bc6e5960-6b48-4be3-addb-49a4f14b6efa

Co-authored-by: data-douser <70299490+data-douser@users.noreply.github.com>

Author: Copilot

extensions/vscode/test/fixtures/multi-root-workspace/test.code-workspace

@@ -11,10 +11,6 @@
 		},
 		{
 			"path": "folder-d"
-		},
-		{
-			"name": "ql-mcp-seq2-DMXgqX",
-			"path": "../../../../../../../../../../private/var/folders/m_/6l74bbjj5wzf7vgl0mxmgwzm0000gn/T/ql-mcp-seq2-DMXgqX"
 		}
 	]
 }