cli: remove sync version

src/cli.ts

@@ -1,21 +1,4 @@
-import { ChildProcess, SpawnSyncOptionsWithBufferEncoding, SpawnSyncReturns, spawnSync as rawSpawnSync } from "child_process";
-
-export function check(result: SpawnSyncReturns<Buffer | string>) {
-    if (result.error)
-        throw result.error;
-    if (result.status !== 0) {
-        throw result.stderr;
-    }
-    return result;
-}
-
-export function checkedSpawnSync(
-    command: string,
-    args: readonly string[],
-    options: SpawnSyncOptionsWithBufferEncoding,
-): SpawnSyncReturns<Buffer | string> {
-    return check(rawSpawnSync(command, args, options));
-}
+import { ChildProcess } from "child_process";
 
 export function promisifySpawn<T extends ChildProcess>(p: T) {
     return new Promise<T>((resolve, reject) => {