Git ident attributes were in most cases utilized with SVN and keywords
substitutions, where $Id$ were replaced with certain revision from the
repository. In Git this functionality is different. Each $Id$ needs to
be defined in .gitattributes file to be effective. This patch removes
unused and outdated attributes.
We've been tracking program deps in the build files, so it ends up
being redundant for a lot of our test/example programs. Clean them
up, and update some of the cmake/automake files as needed.