- remove external zmusic checkout from the ci

.github/workflows/continuous_integration.yml

@@ -63,16 +63,6 @@ jobs:
           eval ${{ matrix.config.deps_cmdline }}
         fi
         mkdir build
-        if [[ "${{ runner.os }}" == 'macOS' ]]; then
-          export ZMUSIC_PACKAGE=zmusic-2025-07-15-mac-universal.tar.xz
-        elif [[ "${{ runner.os }}" == 'Linux' ]]; then
-          export ZMUSIC_PACKAGE=zmusic-2025-07-15-linux.tar.xz
-        fi
-        if [[ -n "${ZMUSIC_PACKAGE}" ]]; then
-          cd build
-          wget -q "https://github.com/coelckers/gzdoom/releases/download/ci_deps/${ZMUSIC_PACKAGE}"
-          tar -xf "${ZMUSIC_PACKAGE}"
-        fi
 
     - name: Git describe
       id: ghd
@@ -81,7 +71,7 @@ jobs:
     - name: Configure
       shell: bash
       run: |
-        cmake -B build -DCMAKE_BUILD_TYPE=${{ matrix.config.build_type }} -DCMAKE_PREFIX_PATH=`pwd`/build/zmusic -DPK3_QUIET_ZIPDIR=ON ${{ matrix.config.extra_options }} .
+        cmake -B build -DCMAKE_BUILD_TYPE=${{ matrix.config.build_type }} -DPK3_QUIET_ZIPDIR=ON ${{ matrix.config.extra_options }} .
 
     - name: Build
       shell: bash