checkstyle9: Remove irrelevant stuff from qemu

checkstyle9: Remove irrelevant stuff from qemu

Remove some qemu project specific things we don't care about

o Remove python interpreter check
o Remove linux header check
o Remove trace file specail treatment
o Add $FreeBSD$ tag additions
o Remove some experiemntal code we won't need
o Remove commented out initializer code that we don't explicitly have a
  rule for.

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