SimicsOpenBoardPkg/BoardX58Ich10: Remove OpenBoardPkgConfig.dsc

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2244



The location for PCD configuration is currently inconsistent in
SimicsOpenBoardPkg. A large set of FeaturePCD definitions are
in OpenBoardPkgConfig.dsc while other PCD definitions (including
FeaturePCD) are located in OpenBoardPkgPcd.dsc.

This change consolidates PCD configuration for the BoardX58Ich10
board to OpenBoardPkgPcd.dsc and removes OpenBoardPkgConfig.dsc.

Cc: Agyeman Prince <prince.agyeman@intel.com>
Cc: Wei David Y <david.y.wei@intel.com>
Signed-off-by: Michael Kubacki <michael.a.kubacki@intel.com>
Reviewed-by: Prince Agyeman <prince.agyeman@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>