Except for mingw-w64-qt5-serialbus* which was built after
2fc2ab6cf0
none of these packages have a checksum anymore (as they use VCS sources after
switching to the KDE fork version).
This commit removes the stale checksum files as they are probably confusing.
This was done via:
```
for p in qt5-* ; do source $p/mingw-w64/PKGBUILD ; [[ ${sha256sums[0]} == SKIP ]] && rm -v $p/*/*-sha256.txt ; done
```
The static Qt modules in the base repository are already packaged as a
separate package (mingw-w64-qt5-base-static). This change applies the same
separation to Qt modules found in further repositories. That means it is no
longer required to build a static version of Qt if only shared libraries
are required.
Note that there's no static variant for mingw-w64-qt5-activeqt because this
module ends up being built as a static library anyways. There is also no
static version of mingw-w64-qt5-translations because it does not contain
any libraries.
Martchus