Fix issue of duplicated blocks upon pasting an image into the Slate E…

packages/volto-slate/news/5818.bugfix

@@ -0,0 +1 @@
+When pasting an image into a Slate block, now only an image block is created, instead of both a Slate block and an image block. @aryan7081

packages/volto-slate/src/blocks/Text/extensions/withDeserializers.js

@@ -46,10 +46,7 @@ export const onImageLoad = (editor, reader) => () => {
     },
   };
 
-  uploadContent(url, content, block).then((data) => {
-    const dlUrl = data.image.download;
-    insertImage(editor, dlUrl);
-  });
+  uploadContent(url, content, block);
 };
 
 export const withDeserializers = (editor) => {