Remove/disable broken code for loading the encoder library from a macos bundle

This refers to a file "bundlewelsenc.h" which doesn't even
exist in the project at the moment.

The corresponding bundle loading code is not called at all
in the decoder console tool.
Remove unused files about macos bundle loading from the console tools
Remove an exclude of an nonexistent file
Merge pull request #180 from mstorsjo/remove-disabled-bundle-loading

Remove disabled/broken/unused code for bundle loading in the console tools