Remove run-db.sh replaced by definition in flake.nix

run-db.sh

@@ -1,6 +0,0 @@
-#! /usr/bin/env nix-shell
-#! nix-shell -i bash db.nix
-
-#TODO create the directories if they don't exists
-#TODO set the path relative to script location, not relative to CWD
-postgres -D .pg-data -k "$PWD/.pg-sockets" #-c listen_addresses='' # Goland does not support connecting over socket