Fix: nested blocks

Author: Tofandel

frontend/js/components/blocks/Blocks.vue

@@ -171,11 +171,6 @@
         handle: '.block__handle' // drag handle
       }
     },
-    provide() {
-      return {
-        nested_block_name: this.name + '|',
-      }
-    },
     computed: {
       ...mapState({
         editor: state => state.blocks.editor,