If no SD card support, remove SD file filter

When SD card support is disabled on the server, remove any client side
filtering to just SD files since there aren't any and there won't be UI
turn remove the filter either.  Should address #1300

src/octoprint/static/js/app/viewmodels/files.js

@@ -396,6 +396,7 @@ $(function() {
                 self.localTarget = $("#drop_locally");
             } else {
                 self.localTarget = $("#drop");
+                self.listHelper.removeFilter('sd');
             }
             self.sdTarget = $("#drop_sd");