Revert "Add Merb.root / 'lib' directory to list of :lib paths so it does autoload."
Revert "Add Merb.root / 'lib' directory to list of :lib paths so it does autoload."

This reverts commit 5ebf1d6c1285df767d7dfd8e34084756ca052534.

The issues with lib/library/lib/library.rb schema is because in merb-core
bootloader sets glob for :lib as nil but should use **/*.rb instead. So this
has to be fixed in merb-core.

merb/merb-gen,merb/merb-gen