gitlab-ci: remove android update sdk, it just breaks things

Unfortunately, something in the way that the docker image is created is
making it impossible to run `android update sdk`. Even though it runs as
root, it cannot upgrade things, and in the process, it seems to break the
Android SDK bits that are there.

  Installing Android Support Repository, revision 40
  Failed to rename directory /android-sdk/extras/android/m2repository to /android-sdk/temp/ExtraPackage.old01.
  Failed to create directory /android-sdk/extras/android/m2repository
  Done. Nothing was installed.

A problem occurred configuring project ':app'.
> Failed to notify project evaluation listener.
   > You have not accepted the license agreements of the following SDK components:
     [Android Support Repository].
     Before building your project, you need to accept the license agreements and complete the installation of the missing components using the Android Studio SDK Manager.
     Alternatively, to learn how to transfer the license agreements from one workstation to another, go to http://d.android.com/r/studio-ui/export-licenses.html
   > Could not resolve all dependencies for configuration ':app:compile'.
      > Could not find com.android.support:support-v4:24.2.1.
        Required by:
            project :app
      > Could not find com.android.support:appcompat-v7:24.2.1.
        Required by:
            project :app
      > Could not find com.android.support:support-annotations:24.2.1.
        Required by:
            project :app

.gitlab-ci.yml

@@ -7,8 +7,6 @@ cache:
 
 before_script:
   - export GRADLE_USER_HOME=$PWD/.gradle
-  - printf 'y\n\n' | android --verbose update sdk --no-ui
-     --filter extra-android-m2repository
 
 test:
   script: