refactor: remove duplicated lines in package.json

package.json

@@ -7,11 +7,9 @@
     "doc": "docs"
   },
   "scripts": {
-    "precommit": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0",
+    "precommit": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0 && git add CHANGELOG.md",
     "test": "echo \"Error: no test specified\" && exit 1",
-    "commitmsg": "commitlint -e $GIT_PARAMS",
-    "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0",
-    "version": "conventional-changelog -p angular -i CHANGELOG.md -s && git add CHANGELOG.md"
+    "commitmsg": "commitlint -e $GIT_PARAMS"
   },
   "repository": {
     "type": "git",