Remove tools/check-build-system (#642)

tools/check-build-system

@@ -1,26 +0,0 @@
-#!/bin/bash -e
-
-tools=(
-    go
-    dotnet
-    npm
-    node
-    java
-    javac
-    mono
-    mcs
-    virtualenv
-)
-
-is_ok=true
-for tool in "${tools[@]}"; do
-    if ! which "$tool" >/dev/null; then
-        is_ok=false
-        echo "$tool not installed!"
-    fi
-done
-if [ "$is_ok" = true ]; then
-    exit 0
-else
-    exit 1
-fi