fix: revert having semantic-release update the changelog.

This doesn't work unless you remove branch protection options.  Until we
figure it out, go back to updating the change log manually.

package.json

@@ -31,7 +31,6 @@
   },
   "devDependencies": {
     "@semantic-release/changelog": "^5.0.1",
-    "@semantic-release/git": "^9.0.0",
     "babel-core": "^6.26.3",
     "babel-loader": "^7.1.5",
     "babel-plugin-istanbul": "^4.1.6",
@@ -141,14 +140,6 @@
             }
           ]
         }
-      ],
-      [
-        "@semantic-release/git",
-        {
-          "assets": [
-            "CHANGELOG.md"
-          ]
-        }
       ]
     ]
   },