Fix build version of the project because of web workers

src/workers/worker.js

@@ -1,25 +0,0 @@
-onmessage = (e) => {
-  const data = JSON.stringify(e.data.editorState, getCircularReplacer(), e.data.spaces);
-  postMessage(data);
-};
-
-const getCircularReplacer = () => {
-  const seen = new WeakSet();
-  return (key, value) => {
-    if (key === 'parent') {
-      return;
-    }
-
-    if (key === 'SelectedContainer') {
-      return;
-    }
-
-    if (typeof value === 'object' && value !== null) {
-      if (seen.has(value)) {
-        return;
-      }
-      seen.add(value);
-    }
-    return value;
-  };
-};