title: BILLING permission error in Console though it is not in manifest
body: <p>History:
  First we implemented In App Purchase of android and also uploaded that apk to alpha channel for testing. But later we remove that implementation. But when we tried to upload the apk in play store for production, we get the following message as warning:</p>
  
  <p>"You uploaded an APK that does not have BILLING permission, or has a BILLING permission that is limited to specific sdk versions. BILLING permission is required for selling in-app products."</p>
  
  <p>In manifest the following was already removed:</p>
  
  <pre><code>&lt;uses-permission android:name="com.android.vending.BILLING" /&gt;
  </code></pre>
  
  <p>Also in gradle file there was nothing for billing.</p>
  
  <p>We also tried with the following:</p>
  
  <pre><code>&lt;uses-permission android:name="com.android.vending.BILLING" tools:node="remove" /&gt;
  </code></pre>
  
  <p>Also the products(sku) removed from google play developer console. 
  But still the the warning is showing when upload apk for production. </p>
  
  <p>We also added google pay with braintree, but the codes needed for google pay is also removed from manifest and gradle but commented out in java files. Are we missing something else? </p>
  
  <p>Thanks in advance for anyone's help.....</p>