message: fix(CI): remove git plugin
diff: "release": {
  "verifyConditions": [
  "condition-circle",
  - "@semantic-release/changelog",
  "@semantic-release/npm",
  - "@semantic-release/git",
  "@semantic-release/github"
  ],
  "getLastRelease": "@semantic-release/npm",
  "publish": [
  - "@semantic-release/changelog",
  "@semantic-release/npm",
  - "@semantic-release/git",
  "@semantic-release/github"
  ]
  },
  "@angular/http": "5.1.1",
  "@angular/platform-browser-dynamic": "5.1.1",
  "@compodoc/compodoc": "1.0.5",
  - "@semantic-release/changelog": "1.0.0",
  - "@semantic-release/git": "2.0.0",
  "@semantic-release/github": "2.2.3",
  "@semantic-release/npm": "2.3.1",
  "@types/jasmine": "2.8.2",
  