Remove alt, use aria-label

src/components/views/messages/MAudioBody.js

@@ -95,7 +95,7 @@ export default class MAudioBody extends React.Component {
             // Not sure how tall the audio player is so not sure how tall it should actually be.
             return (
                 <span className="mx_MAudioBody">
-                    <InlineSpinner alt={content.body} />
+                    <InlineSpinner />
                 </span>
             );
         }

src/components/views/messages/MImageBody.js

@@ -366,7 +366,7 @@ export default class MImageBody extends React.Component {
 
         // e2e image hasn't been decrypted yet
         if (content.file !== undefined && this.state.decryptedUrl === null) {
-            placeholder = <InlineSpinner alt={content.body} w={32} h={32} />;
+            placeholder = <InlineSpinner w={32} h={32} />;
         } else if (!this.state.imgLoaded) {
             // Deliberately, getSpinner is left unimplemented here, MStickerBody overides
             placeholder = this.getPlaceholder();

src/components/views/messages/MVideoBody.js

@@ -148,7 +148,7 @@ export default createReactClass({
             return (
                 <span className="mx_MVideoBody">
                     <div className="mx_MImageBody_thumbnail mx_MImageBody_thumbnail_spinner">
-                        <InlineSpinner alt={content.body} />
+                        <InlineSpinner />
                     </div>
                 </span>
             );