docs: Fix debian installation guide

Once that kata-containers/tests#1767 lands,
we can remove from the installation guide the steps of adding the
librbd1 repository.

Fixes #511

Signed-off-by: Gabriela Cervantes <[email protected]>

Author: GabyCT

install/debian-installation-guide.md

@@ -1,33 +1,6 @@
 # Install Kata Containers on Debian
 
-1. Install the unsatisfied dependencies
-
-   Kata Containers packages depends on a version of `librbd1` that's not yet available in the `stable` repo.
-   A more recent version of `librbd1` can be installed from the `unstable` repo: https://packages.debian.org/sid/librbd1
-
-   Add `unstable` repo to `/etc/apt/sources.list.d/unstable.list` sources list:
-
-   ```bash
-   $ sudo sh -c "echo '# for unstable packages
-   deb http://ftp.debian.org/debian/ unstable main contrib non-free
-   deb-src http://ftp.debian.org/debian/ unstable main contrib non-free' > /etc/apt/sources.list.d/unstable.list"
-   ```
-
-   Set the repository to a lower priority than stable, to ensures that APT will prefer stable packages over unstable ones. This can be specified in `/etc/apt/preferences.d/unstable`:
-
-   ```bash
-   $ sudo sh -c "echo 'Package: *
-   Pin: release a=unstable
-   Pin-Priority: 10' >> /etc/apt/preferences.d/unstable"
-   ```
-
-   Finally, install `librbd1`:
-
-   ```bash
-   $ sudo apt-get update && sudo apt-get install -y -t unstable librbd1
-   ```
-
-2. Install the Kata Containers components with the following commands:
+1. Install the Kata Containers components with the following commands:
 
    ```bash
    $ export DEBIAN_FRONTEND=noninteractive
@@ -43,7 +16,7 @@
    $ sudo -E apt-get -y install kata-runtime kata-proxy kata-shim
    ```
 
-3. Decide which container manager to use and select the corresponding link that follows:
+2. Decide which container manager to use and select the corresponding link that follows:
 
    - [Docker](docker/debian-docker-install.md)
    - [Kubernetes](https://github.com/kata-containers/documentation/blob/master/Developer-Guide.md#run-kata-containers-with-kubernetes)