Unused code in Workspace creation

[zjkmxy]

The code purpose is unclear.

ndnts-aux/src/workspace/workspace.ts

Lines 35 to 37 in 3064dac

	const clientID = opts.rootDoc.clientID;
	opts.rootDoc.clientID = 0;
	opts.rootDoc.clientID = clientID;

Also, opts.createNewDoc already handles clientID. No need to do it here.