BaseTools: Remove the logic SourceOverridePath

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1350
SOURCE_OVERRIDE_PATH is for EDK component INF files.
The corresponding logic should be removed.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

BaseTools/Source/Python/Workspace/BuildClassObject.py

@@ -413,7 +413,6 @@ class ModuleBuildClassObject(object):
         self.PcdIsDriver             = ''
         self.BinaryModule            = ''
         self.Shadow                  = ''
-        self.SourceOverridePath      = ''
         self.CustomMakefile          = {}
         self.Specification           = {}
         self.LibraryClass            = []