Remove unneeded tests-debian-packaging.sh, we have it in CI now

tests-debian-packaging.sh

@@ -1,25 +0,0 @@
-#!/bin/bash
-
-set -eou pipefail
-
-DISTS=(
-  debian:trixie
-)
-
-for dist in ${DISTS[@]}; do
-  release=$(echo ${dist} | cut -d: -f2)
-  mkdir -p dist/${release}
-
-  docker build -f Dockerfile.debbuild -t bouquin-deb:${release} \
-    --no-cache \
-    --progress=plain \
-    --build-arg BASE_IMAGE=${dist} .
-
-  docker run --rm \
-    -e SUITE="${release}" \
-    -v "$PWD":/src \
-    -v "$PWD/dist/${release}":/out \
-    bouquin-deb:${release}
-
-  debfile=$(ls -1 dist/${release}/*.deb)
-done