fixed lint errors

builtins/amp-img.js

@@ -16,8 +16,8 @@
 
 import {BaseElement} from '../src/base-element';
 import {dev} from '../src/log';
-import {isExperimentOn} from '../src/experiments';
 import {guaranteeSrcForSrcsetUnsupportedBrowsers} from '../src/utils/img';
+import {isExperimentOn} from '../src/experiments';
 import {isLayoutSizeDefined} from '../src/layout';
 import {listen} from '../src/event-helper';
 import {registerElement} from '../src/service/custom-element-registry';
@@ -177,24 +177,6 @@ export class AmpImg extends BaseElement {
     return true;
   }
 
-  /**
-   * Sets the img src to the first url in the srcset if srcset is defined but
-   * src is not.
-   * @private
-   */
-  guaranteeSrcForSrcsetUnsupportedBrowsers_() {
-    // The <img> tag does not have a src and does not support srcset
-    if (!this.img_.hasAttribute('src') && 'srcset' in this.img_ == false) {
-      const srcset = this.element.getAttribute('srcset');
-      const matches = /\S+/.exec(srcset);
-      if (matches == null) {
-        return;
-      }
-      const srcseturl = matches[0];
-      this.img_.setAttribute('src', srcseturl);
-    }
-  }
-
   /**
    * Checks to see if there is a placeholder that is blurred
    * @private
@@ -213,10 +195,10 @@ export class AmpImg extends BaseElement {
    * placeholder if one exists, or hiding the fallback if not
    */
   renderImg_() {
-    if(this.hasBlurredPlaceHolder_){
+    if (this.hasBlurredPlaceHolder_) {
       this.element.classList.add('i-amphtml-blur-loaded');
     } else {
-      this.hideFallbackImg_();    
+      this.hideFallbackImg_();
     }
   }