Remove Mac OS "Contents/Home" workaround

[Christian Stein]

actions/setup-java#139 (comment)

may supersede

download-jdk/action.yml

Lines 32 to 42 in 09f9809

     - name: 'Repackage tarball on Mac OS' 
       shell: bash 
       run: | 
         if [ "$RUNNER_OS" == "macOS" ]; then 
           echo 'Repackage tarball on Mac OS' 
           JDK_EXTRACTED=${HOME}/downloaded-jdk-${{ inputs.feature }} 
           mkdir ${JDK_EXTRACTED} 
           tar --extract --file ${JDK_FILE} -C ${JDK_EXTRACTED} --strip-components 4 
           rm ${JDK_FILE} 
           tar --create --file ${JDK_FILE} -C ${HOME} downloaded-jdk-${{ inputs.feature }} 
         fi