Removed update-readmes.sh, not needed anymore.

update-readmes.sh

@@ -1,23 +0,0 @@
-#!/bin/sh
-# Needs gnu-sed on macOS for inplace replacement
-# brew install --with-default-names gnu-sed
-set -e
-
-if [ -z "$1" ] 
-	then
-		echo "Usage: ./update-readmes.sh <from-branch> <to-branch>"
-		echo "Example: ./update-readmes.sh 3.6 3.7"
-		exit
-fi
-
-if [ -z "$2" ] 
-	then
-		echo "Usage: ./update-readmes.sh <from-branch> <to-branch>"
-		echo "Example: ./update-readmes.sh 3.6 3.7"
-		exit
-fi
-
-find . -type f -name 'README.md' | while read line; do
-	echo "Updating $line"
-	sed -i "s,https://github.com/EsotericSoftware/spine-runtimes/archive/$1.zip,https://github.com/EsotericSoftware/spine-runtimes/archive/$2.zip,g" $line
-done