Ports: Remove some config.sub patches and download a fresh one if needed

All of these patches did the same thing, which is already in upstream
config.sub.
With this change, we need only add `use_fresh_config_sub=true` to
the package.sh file.
Note that this is not done automatically in case the port has a modified
config.sub file.

Ports/zsh/package.sh

@@ -4,6 +4,7 @@ version=5.8
 files="https://sourceforge.net/projects/zsh/files/zsh/${version}/zsh-${version}.tar.xz zsh-${version}.tar.xz dcc4b54cc5565670a65581760261c163d720991f0d06486da61f8d839b52de27"
 auth_type="sha256"
 useconfigure=true
+use_fresh_config_sub=true
 
 pre_configure() {
     run "./Util/preconfig"

Ports/zsh/patches/0001-add-serenity-config-sub.patch

@@ -1,11 +0,0 @@
---- zsh-zsh-5.8/original-config.sub	2021-06-04 22:59:03.710400955 -0300
-+++ zsh-zsh-5.8/config.sub	2021-06-04 23:01:41.573688625 -0300
-@@ -1516,6 +1516,8 @@
- 		;;
- 	*-eabi)
- 		;;
-+	serenity*)
-+		;;
- 	*)
- 		echo Invalid configuration \`"$1"\': system \`"$os"\' not recognized 1>&2
- 		exit 1