Revert "Add user-agent attribute "

This reverts commit 365418d161.

scripts/helpers/Channel.js

@@ -113,10 +113,6 @@ module.exports = class Channel {
       this.tvg.language || ''
     }" tvg-logo="${this.logo || ''}"`
 
-    if (this.http['user-agent']) {
-      info += ` user-agent="${this.http['user-agent']}"`
-    }
-
     info += ` group-title="${this.group.title || ''}",${this.name}`
 
     if (this.resolution.height) {