Revert "add doxygen configuration for other CK-Core projects"

This reverts commit f2cddac5f5d88c1862715e11e5b50abd0281a03e.
Revert "Add doxygen configuration in order to build a nice html documentation for CK.Core"

This reverts commit 43349c4f45abfb5dfdb9eb57baa8fcb1eb6f2db8.