fix get-npm-tag logic

Author: shirakaba

.github/workflows/npm_napi_release.yml

@@ -54,10 +54,6 @@ jobs:
             sudo mkdir -p /usr/local/bin
             sudo ln -sf "$(command -v cmake)" /usr/local/bin/cmake
           fi
-      - name: Get Current Version
-        run: |
-          NPM_VERSION=$(node -e "console.log(require('./package.json').version);")
-          echo NPM_VERSION=$NPM_VERSION >> $GITHUB_ENV
       - name: Bump versions for dev release
         if: ${{ !contains(github.ref, 'refs/tags/') }}
         run: |