nix unused unist-util-visit module

.storybook/lib/storiesFromMarkdown.js

@@ -1,6 +1,5 @@
 import remark from 'remark'
 import parents from 'unist-util-parents'
-import visit from 'unist-util-visit'
 import select from 'unist-util-select'
 import findBefore from 'unist-util-find-before'
 import htmlToReact from 'html-to-react'

package.json

@@ -45,7 +45,6 @@
     "unist-util-find-before": "^2.0.1",
     "unist-util-parents": "^1.0.0",
     "unist-util-select": "^1.5.0",
-    "unist-util-visit": "^1.1.3",
     "yo": "^2.0.0"
   }
 }