Remove the GitHub Action to check the remote builder task length

With the merging of
redhat-appstudio/infra-deployments#5201 the deployment of Konflux now properly supports larger sized of tasks.

Even without this fix merged, the FBC pipeline is now based on the multi-platform pipeline and therefore will test the default pipeline which includes the buildah-remote task. We can fall back to the signal with that test to ensure that the task continues to work properly in the local cluster.

Signed-off-by: arewm <[email protected]>