GitLab

See sdk/kdesrc-build!82

GIT_SILENT

Frameworks will be Frameworks 6 at some point and there is no good reason to have the major version in the variable name.

Given this is purely internal we can to this now, making it a bit more future-proof

GIT_SILENT

NO_CHANGELOG

Commit contains no functional changes, only makes build system
better readable.

Frameworks are already in the 5.* era, thus remove the KDElibs
versioning information.

These statements only are present in 4 headers and duplicate the
information from the license statements, which allows future
possible deviations due to duplicated statements.