Remove Include/ directory.

It was committed into root directory by mistake at R17657.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17663 6f19259b-4bc3-4df7-8a09-765794883524