clean scss

packages/remark-drawio/src/components/DrawioViewer.module.scss

@@ -2,11 +2,4 @@
   margin: 20px 0;
   border: 1px solid transparent;
   border-radius: 4px;
-
-  .geDiagramContainer {
-    // centering
-    margin-right: auto;
-    margin-left: auto;
-  }
-
 }