expect-post-runner.sh: Remove apt install command as it's already available

Was installed in docker image long ago.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Ic83bf71bf665c13b690a6811856c791bf84f693d
diff --git a/script/expect-post-runner.sh b/script/expect-post-runner.sh
index b695b31..3b38e65 100755
--- a/script/expect-post-runner.sh
+++ b/script/expect-post-runner.sh
@@ -12,11 +12,6 @@
 ci_root="$(readlink -f "$(dirname "$0")/..")" && \
     . "${ci_root}/utils.sh"
 
-# TODO: move dependency installation to the Dockerfile
-sudo DEBIAN_FRONTEND=noninteractive apt update && \
-    sudo DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt install -y expect ||
-    exit 1
-
 archive="${WORKSPACE}/artefacts-lava"
 
 # Extract UART numbering from the FVP common log using the ports script