BaseTools: remove redundant if comparison

inherently python will check string and list for None and having data

if <x> in [None, ''] and similar are superflous.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>

BaseTools/Source/Python/AutoGen/GenC.py

@@ -866,7 +866,7 @@ def DynExPcdTokenNumberMapping(Info, AutoGenH):
 def GetPcdSize(Pcd):
     if Pcd.DatumType not in TAB_PCD_NUMERIC_TYPES:
         Value = Pcd.DefaultValue
-        if Value in [None, '']:
+        if not Value:
             return 1
         elif Value[0] == 'L':
             return (len(Value) - 2) * 2