Edk2: Retire Edk2Setup.bat
Edk2: Retire Edk2Setup.bat

Edk2Setup.bat is out of maintain. It is a draft version batch file, and not
implement all features listed in its header file. To avoid the confuse,
drop it from edk2 project, and keep edksetup.bat only.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>
Reviewed-by: Laszlo Ersek <7437296077edea1cb64451c122c4dac071f0cfbc@redhat.com>

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