dump.c was recently added to the code. It unconditionally
includes sys/procfs which is not available with MinGW (w32, w64).

It looks like this file is not needed at all (tested on Linux),
so I removed it completely.

Some other include statements are also redundant because they are
already included in qemu-common, therefore they were removed, too.
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>