Use org's .github defaults

.github/FUNDING.yml

@@ -1,3 +0,0 @@
-github: markdown-it
-open_collective: markdown-it
-tidelift: "npm/markdown-it"

.github/dependabot.yml

@@ -1,13 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: github-actions
-    directory: /
-    schedule:
-      interval: daily
-
-  - package-ecosystem: npm
-    directory: /
-    schedule:
-      interval: daily
-    allow:
-      - dependency-type: production