CI: Don't build ostree (ppa is new enough now)

.github/workflows/check.yml

@@ -53,14 +53,6 @@ jobs:
         ninja -C _build
         sudo ninja -C _build install
         popd
-    - name: Build ostree dependency
-      run: |
-        git clone --branch v2020.8 --depth 1 --no-tags https://github.com/ostreedev/ostree.git ./ostree
-        pushd ./ostree
-        ./autogen.sh --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --sysconfdir=/etc --localstatedir=/var
-        make -j $(getconf _NPROCESSORS_ONLN)
-        sudo make install
-        popd
     - name: Create logs dir
       run: mkdir test-logs
     - name: autogen.sh
@@ -124,14 +116,6 @@ jobs:
         libjson-glib-dev shared-mime-info desktop-file-utils libpolkit-agent-1-dev libpolkit-gobject-1-dev \
         libseccomp-dev libsoup2.4-dev libsystemd-dev libxml2-utils libgpgme11-dev gobject-introspection \
         libgirepository1.0-dev libappstream-glib-dev libdconf-dev clang e2fslibs-dev
-    - name: Build ostree dependency
-      run: |
-        git clone --branch v2020.8 --depth 1 --no-tags https://github.com/ostreedev/ostree.git ./ostree
-        pushd ./ostree
-        ./autogen.sh --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --sysconfdir=/etc --localstatedir=/var
-        make -j $(getconf _NPROCESSORS_ONLN)
-        sudo make install
-        popd
     - name: Check out flatpak
       uses: actions/checkout@v1
       with:
@@ -163,14 +147,6 @@ jobs:
       uses: actions/checkout@v1
       with:
         submodules: true
-    - name: Build ostree dependency
-      run: |
-        git clone --branch v2020.8 --depth 1 --no-tags https://github.com/ostreedev/ostree.git ./ostree
-        pushd ./ostree
-        ./autogen.sh --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --sysconfdir=/etc --localstatedir=/var
-        make -j $(getconf _NPROCESSORS_ONLN)
-        sudo make install
-        popd
     - name: configure
       run: ./autogen.sh
       env: