Remove shebangs from non-executable configuration source scripts

src/shell-integration/bash/ghostty.bash

@@ -1,5 +1,3 @@
-#!/usr/bin/env bash
-#
 # This is originally based on the recommended bash integration from
 # the semantic prompts proposal as well as some logic from Kitty's
 # bash integration.

src/shell-integration/fish/vendor_conf.d/ghostty-shell-integration.fish

@@ -1,5 +1,3 @@
-#!/bin/fish
-#
 # This shell script aims to be written in a way where it can't really fail
 # or all failure scenarios are handled, so that we never leave the shell in
 # a weird state. If you find a way to break this, please report a bug!