Remove base oclif eslint plugin

oclif projects can all use the base eslint plugin (eslint-config-oclif)
For oclif typescript projects the rules defined by this  plugin can
be additionally applied

Author: chadian

index.js

@@ -1,6 +1,5 @@
 module.exports = {
   extends: [
-    "oclif",
     "plugin:@typescript-eslint/eslint-recommended",
     "plugin:@typescript-eslint/recommended"
   ],

package.json

@@ -7,7 +7,6 @@
   "dependencies": {
     "@typescript-eslint/eslint-plugin": "^2.6.1",
     "@typescript-eslint/parser": "^2.6.1",
-    "eslint-config-oclif": "^3.1.0",
     "eslint-config-xo-space": "^0.20.0",
     "eslint-plugin-mocha": "^5.2.0",
     "eslint-plugin-node": "^7.0.1",