Remove unneeded check for disposed terminal (microsoft#184190)

Since microsoft#180018 is fixed

Author: roblourens

src/vs/workbench/contrib/chat/browser/actions/chatCodeblockActions.ts

@@ -336,9 +336,8 @@ export function registerChatCodeBlockActions() {
 
 			let terminal = await terminalService.getActiveOrCreateInstance();
 
-			// Why does getActiveOrCreateInstance return a disposed terminal? #180018
-			// isFeatureTerminal = debug terminal
-			const unusableTerminal = terminal.isDisposed || terminal.xterm?.isStdinDisabled || terminal.shellLaunchConfig.isFeatureTerminal;
+			// isFeatureTerminal = debug terminal or task terminal
+			const unusableTerminal = terminal.xterm?.isStdinDisabled || terminal.shellLaunchConfig.isFeatureTerminal;
 			terminal = unusableTerminal ? await terminalService.createTerminal() : terminal;
 
 			terminalService.setActiveInstance(terminal);