feat!: remove deprecated ability to run as ember addon command

Author: Kelly Selden

.github/workflows/ci.yml

@@ -33,7 +33,6 @@ jobs:
         # - '*'
         test-command:
         - test:bin
-        - test:command
         - test:fast
         exclude:
         # - os: macos-latest

appveyor.yml

@@ -35,7 +35,6 @@ test_script:
   - node --version
   - npm --version
   - npm run test:bin
-  - npm run test:command
 
 # http://help.appveyor.com/discussions/questions/1310-delete-cache
 cache:

package.json

@@ -11,7 +11,6 @@
     "lint": "eslint . --ext js,json",
     "start": "node bin/ember-cli-update",
     "test": "mocha \"test/!(fixtures)/**/*-test.js\"",
-    "test:command": "mocha test/acceptance/ember-addon-test.js",
     "test:bin": "mocha test/acceptance/ember-cli-update-test.js",
     "test:fast": "mocha \"test/+(integration|unit)/**/*-test.js\""
   },
@@ -21,7 +20,6 @@
   },
   "keywords": [
     "ember.js",
-    "ember-addon",
     "ember-cli"
   ],
   "author": "Kelly Selden",
@@ -72,8 +70,5 @@
     "sinon": "^11.0.0",
     "sinon-chai": "^3.3.0",
     "standard-node-template": "2.0.0"
-  },
-  "ember-addon": {
-    "main": "src/ember-addon.js"
   }
 }