Remove unused dependencies

The @octokit/plugin- references are not actually (directly) used by
@action/github-script and so only serve to confuse about what exact
version of these is included in the action. The actual versions of
these plugins are set by @action/github.

Ignoring newlines, the dist/index.js file is exactly the same without
listing these dependencies in package.json.

Author: mjpieters

.licenses/npm/@octokit/openapi-types-13.2.0.dep.yml

@@ -37,9 +37,7 @@
     "@actions/glob": "^0.3.0",
     "@actions/io": "^1.1.1",
     "@octokit/core": "^3.5.1",
-    "@octokit/plugin-paginate-rest": "^2.17.0",
     "@octokit/plugin-request-log": "^1.0.4",
-    "@octokit/plugin-rest-endpoint-methods": "^6.3.0",
     "@octokit/plugin-retry": "^3.0.9",
     "node-fetch": "^2.6.7"
   },