erp5_document_scanner: Remove useless code

bt5/erp5_document_scanner/PathTemplateItem/web_page_module/rjs_gadget_document_scanner_js.js

@@ -488,10 +488,7 @@
           new Promise(function (resolve) {
             resolve(canvas.toDataURL("image/jpeg", compression));
           }),
-          buildPreviousThumbnailDom(gadget),
-          new Promise(function (resolve) {
-            canvas.toBlob(resolve, "image/jpeg", compression);
-          })
+          buildPreviousThumbnailDom(gadget)
         ]);
       })
       .push(function (result_list) {

bt5/erp5_document_scanner/PathTemplateItem/web_page_module/rjs_gadget_document_scanner_js.xml

@@ -262,7 +262,7 @@
                           </tuple>
                           <state>
                             <tuple>
-                              <float>1583144747.41</float>
+                              <float>1583145490.98</float>
                               <string>UTC</string>
                             </tuple>
                           </state>