Remove Modin from Ray wheels. (#5647)

There are several reasons for this:

* We no longer support python2
* There should be only 1 way of installing Modin
  * Issue management on these wheels
* I have never heard of anyone using this feature
* It is rarely kept up to date
* Modin depends on specific versions of Ray because of past API changes

thirdparty/scripts/setup.sh

@@ -26,8 +26,3 @@ echo "Python library will be built."
 fi
 
 unamestr="$(uname)"
-
-##############################################
-# modin
-##############################################
-bash "$TP_SCRIPT_DIR/build_modin.sh" $PYTHON_EXECUTABLE