Revert "Add spinner indicator"

This reverts commit a4dbfb2.

Author: yuanchuan

lib/handler.js

@@ -42,9 +42,7 @@ export async function handleRender(source, options) {
 
     try {
         const start = Date.now();
-        let spinner = showSpinner();
         const output = await render(content, options);
-        spinner.stop();
         const time = (Date.now() - start) / 1000;
         if (output) {
             console.log(`Saved to ${output}. (${time}s)`);
@@ -214,18 +212,3 @@ function readTime(number, options = {}) {
     }
     return Math.min(result, options.max ?? Infinity);
 }
-
-function showSpinner() {
-    let i = 0;
-    let spinner = ['|', '/', '-', '\\'];
-    let timer = setInterval(() => {
-        process.stdout.write(`\r${spinner[i++]}`);
-        i &= 3;
-    }, 100);
-    return {
-        stop: () => {
-            clearInterval(timer);
-            process.stdout.write('\r');
-        }
-    }
-}