CMake: don't build tests when imported in another project

extras/scripts/create-build-envs.sh

@@ -1,29 +0,0 @@
-#!/bin/bash
-
-export PATH="$PATH:/Applications/CMake.app/Contents/bin/"
-
-cd $(dirname $0)/../..
-ROOT=$(pwd)
-
-mkdir "build"
-cd build
-BUILD=$(pwd)
-
-build-env()
-{
-	cd $BUILD
-	mkdir "$1"
-	cd "$1"
-	cmake "$ROOT" -G "$2"
-}
-
-if [[ $(uname) == MINGW* ]]
-then
-	build-env "Make" "MinGW Makefiles"
-	build-env "SublimeText" "Sublime Text 2 - Ninja"
-	build-env "VisualStudio" "Visual Studio 14 2015"
-else
-	build-env "SublimeText" "Sublime Text 2 - Ninja"
-	build-env "Make" "Unix Makefiles"
-	build-env "Xcode" "Xcode"
-fi