refactor: remove unused anti-detection code

src/btn.ts

@@ -50,22 +50,6 @@ export class BtnList {
       return txt.includes('Download') || txt.includes('Print')
     }) as HTMLSpanElement
 
-    // Anti-detection:
-    // musescore will send a track event "MSCZDOWNLOADER_INSTALLED" to its backend 
-    //    if detected "Download MSCZ"
-    ['textContent', 'innerHTML'].forEach((_property) => {
-      const _set = textNode['__lookupSetter__'](_property)
-      Object.defineProperty(textNode, _property, {
-        set (v) { _set.call(textNode, v) },
-        get: () => {
-          // first time only
-          const t = this.antiDetectionText
-          this.antiDetectionText = ' '
-          return t
-        },
-      })
-    })
-
     const setText = (str: string): void => {
       textNode.textContent = str
     }
@@ -112,7 +96,10 @@ export class BtnList {
   commit (): void {
     let el = this._commit()
     const observer = new MutationObserver(() => {
+      // check if the buttons are still in document when dom updates 
       if (!document.contains(el)) {
+        // re-commit
+        // performance issue?
         el = this._commit()
       }
     })