chore: remove standard-markdown

Author: Kikobeats

package.json

@@ -58,7 +58,6 @@
     "rollup-plugin-visualizer": "latest",
     "simple-git-hooks": "latest",
     "standard": "latest",
-    "standard-markdown": "latest",
     "standard-version": "latest",
     "stream-to-promise": "latest",
     "tsd": "latest"
@@ -110,9 +109,6 @@
       "prettier-standard",
       "standard --fix"
     ],
-    "*.md": [
-      "standard-markdown"
-    ],
     "package.json": [
       "finepack"
     ]