ports: Don't update ports on every build

This makes using ports much less painful :)

ports/update.sh

@@ -1,16 +0,0 @@
-#!/bin/bash
-
-if [ -z $BANAN_PORT_DIR ]; then
-	echo  "You must set the BANAN_PORT_DIR environment variable" >&2
-	exit 1
-fi
-
-cd $(dirname $(realpath $0))
-
-rm -f $BANAN_PORT_DIR/.installed
-
-while IFS= read -r port; do
-	pushd $(dirname "$port") >/dev/null
-	./build.sh
-	popd >/dev/null
-done < <(find $BANAN_PORT_DIR -name '.compile_hash')