Remove unused ENV variable

Author: ChadKillingsworth

.github/workflows/build.yml

@@ -193,7 +193,6 @@ jobs:
     env:
       NODE_VERSION: '20.x'
       FORCE_COLOR: '1'
-      MUSL_HOME: ${{ github.workspace }}/musl-toolchain
     steps:
       - name: Setup Java
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1