Update src/vs/workbench/contrib/terminal/browser/chatTerminalCommandMirror.ts

Co-authored-by: Copilot <[email protected]>

Author: meganrogge

src/vs/workbench/contrib/terminal/browser/chatTerminalCommandMirror.ts

@@ -188,8 +188,6 @@ export class DetachedTerminalCommandMirror extends Disposable implements IDetach
 		this._lastVT = vt.text;
 		this._lineCount = vt.lineCount;
 
-		const xterm = await this._terminalInstance.xtermReadyPromise;
-		const sourceRaw = xterm?.raw;
 		if (sourceRaw) {
 			this._sourceRaw = sourceRaw;
 			this._lastUpToDateCursorY = this._getAbsoluteCursorY(sourceRaw);