dev-perl/Date-Manip: Remove POD Authortests

dev-perl/Date-Manip: Remove POD Authortests

This removes the various (optional) POD tests and the related
dependencies as they can never serve an end user any benefit about
reporting their dist broken.

All it can do is introduce more things that break, and more dependencies
for stabilization.

Keywords:
- This fix removes one broken keyword dependency issue,
  ~m68k -> Test-Pod-Coverage
- dev-perl/Test-Inter is still unsatisfied on ~arm64 and ~m68k
- virtual/perl-Storable is still unsatisfied on ~m68k

Package-Manager: portage-2.3.0
RepoMan-Options: --include-arches="alpha amd64 amd64-fbsd arm hppa ia64 mips nios2 ppc ppc64 riscv s390 sh sparc sparc-fbsd x86 x86-fbsd"