The old, deprecated Qt4.6 libraries that had the libqt4-maemo5-prefix have been removed from extras-devel as announced a month ago.
The packages depending on them were also removed to avoid broken dependency chains and non-installable packages. Should the original authors or new maintainers decide to update the packages to the current version of Qt, the sources will remain available through the source repositories.

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Note that this deprecation does not affect the libqt4-maemo5 package, which is part of Qt4.6 in PR1.2+. The next step in the Qt transition process is the upload of QtMobility packages for Qt4.7 (libqt4-experimental-*) into extras-devel.



Link: Original article.