Removing env variables (#36242)

src/vs/vscode.d.ts

@@ -4855,7 +4855,7 @@ declare module 'vscode' {
 		/**
 		 * Object with environment variables that will be added to the VS Code process.
 		 */
-		env?: { [key: string]: string };
+		env?: { [key: string]: string | null };
 	}
 
 	/**

src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts

@@ -778,7 +778,12 @@ export class TerminalInstance implements ITerminalInstance {
 		const env = TerminalInstance._cloneEnv(parentEnv);
 		if (shell.env) {
 			Object.keys(shell.env).forEach((key) => {
-				env[key] = shell.env[key];
+				const value = shell.env[key];
+				if (typeof value === 'string') {
+					env[key] = value;
+				} else {
+					delete env[key];
+				}
 			});
 		}