Maintainers.txt: Remove EdkShellPkg and EkdShellBinPkg
Given that EdkShellPkg and EkdShellBinPkg will be removed,
information about them in Maintainers.txt should also be
deleted.
https://bugzilla.tianocore.org/show_bug.cgi?id=1107
https://bugzilla.tianocore.org/show_bug.cgi?id=1108
Cc: Andrew Fish <afish@apple.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Leif Lindholm <leif.lindholm@linaro.org> Cc: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>