Remove NPM_CONFIG_LEGACY_PEER_DEPS from workflow

Author: ledsun

.github/workflows/eslint-9+.yml

@@ -51,8 +51,6 @@ jobs:
           node-version: ${{ matrix.node-version }}
           after_install: |
             npm install --no-save "eslint@${{ matrix.eslint }}" "@typescript-eslint/parser@${{ matrix.eslint == 10 && 'canary' || matrix.typescript-eslint }}" "babel-eslint@${{ matrix.babel-eslint }}" "typescript@5"
-        env:
-          NPM_CONFIG_LEGACY_PEER_DEPS: "${{ matrix.typescript-eslint >= 6 && 'false' || 'true' }}"
       - run: npx ls-engines
       - run: npm run unit-test
       - uses: codecov/codecov-action@v3.1.5