remove the libtool kludge.

.github/workflows/build.yml

@@ -9,14 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - name: Install libtool v2.4.7
-      run: |
-        wget -q https://ftpmirror.gnu.org/libtool/libtool-2.4.7.tar.gz
-        tar xvfz libtool-2.4.7.tar.gz
-        cd libtool-2.4.7
-        ./configure
-        make
-        sudo make install
     - name: Configure
       run: |
         ./bootstrap.sh