[server] ignore stderr while resolving shell env

see gitpod-io/gitpod#4460 (comment) for motivation

src/vs/platform/environment/node/shellEnv.ts

@@ -97,7 +97,8 @@ async function doResolveUnixShellEnv(logService: ILogService): Promise<typeof pr
 
 		const child = spawn(systemShellUnix, [...shellArgs, command], {
 			detached: true,
-			stdio: ['ignore', 'pipe', 'pipe'],
+			// see https://github.com/gitpod-io/gitpod/issues/4460#issuecomment-863799213
+			stdio: ['ignore', 'pipe', 'ignore'],
 			env
 		});
 
@@ -107,20 +108,17 @@ async function doResolveUnixShellEnv(logService: ILogService): Promise<typeof pr
 		});
 
 		const buffers: Buffer[] = [];
-		child.stdout.on('data', b => buffers.push(b));
-
-		const stderr: Buffer[] = [];
-		child.stderr.on('data', b => stderr.push(b));
+		child.stdout.on('data', b => {
+			logService.trace('getUnixShellEnvironment#stdoutData', b.toString('utf8'));
+			buffers.push(b);
+		});
 
 		child.on('close', (code, signal) => {
+			logService.trace('getUnixShellEnvironment#close', code, signal);
+
 			const raw = Buffer.concat(buffers).toString('utf8');
 			logService.trace('getUnixShellEnvironment#raw', raw);
 
-			const stderrStr = Buffer.concat(stderr).toString('utf8');
-			if (stderrStr.trim()) {
-				logService.trace('getUnixShellEnvironment#stderr', stderrStr);
-			}
-
 			if (code || signal) {
 				return reject(new Error(`Failed to get environment (code ${code}, signal ${signal})`));
 			}