chore: remove unused files

.secret-sample

@@ -1 +0,0 @@
-somesecret

scripts/secrets-entrypoint.sh

@@ -1,27 +0,0 @@
-#!/usr/bin/env bash
-
-# https://github.com/adrian-gheorghe/demo-docker-secrets-env-vars
-set -e
-
-file_env() {
-	local var="$1"
-	local fileVar="${var}_FILE"
-	local def="${2:-}"
-
-	if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
-		echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
-		exit 1
-	fi
-	local val="$def"
-	if [ "${!var:-}" ]; then
-		val="${!var}"
-	elif [ "${!fileVar:-}" ]; then
-		val="$(< "${!fileVar}")"
-	fi
-	export "$var"="$val"
-	unset "$fileVar"
-}
-
-file_env "SECRET"
-
-exec "$@"