chore(ci): Delete unused changelog script

Signed-off-by: Kjeld Schouten <info@kjeldschouten.nl>

.github/scripts/changelog.sh

@@ -1,21 +0,0 @@
-#!/usr/bin/env bash
-set -o errexit
-set -o nounset
-set -o pipefail
-
-if [[ -d "charts/${1}" ]]; then
-    echo "Start processing charts/${1} ..."
-    chart="charts/${1}"
-    chartversion=$(cat charts/${1}/Chart.yaml | grep "^version: " | awk -F" " '{ print $2 }')
-    chartname=$(basename charts/${1})
-    train=$(basename $(dirname "charts/${1}"))
-    SCALESUPPORT=$(cat charts/${1}/Chart.yaml | yq '.annotations."truecharts.org/SCALE-support"' -r)
-    # Ensure to start with a clean slate
-    rm -rf ${chart}/app-changelog.md || echo "changelog not found..."
-    echo "Generating changelogs for: ${chartname}"
-    # SCALE "Changelog" containing only last change
-    git-chglog --next-tag ${chartname}-${chartversion} --tag-filter-pattern "^${chartname}-\d+\.\d+\.\d+\$" --path ${chart} -o ${chart}/app-changelog.md ${chartname}-${chartversion} || echo "changelog generation failed..."
-else
-    echo "Chart 'charts/${1}' no longer exists in repo. Skipping it..."
-fi
-echo "Done processing charts/${1} ..."