BaseTools: Remove unused logic for IPF

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1350
Remove IPF support from BaseTools C code.

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

BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py

@@ -56,7 +56,6 @@ class GenFdsGlobalVariable:
     ToolChainTag = ''
     RuleDict = {}
     ArchList = None
-    VtfDict = {}
     ActivePlatform = None
     FvAddressFileName = ''
     VerboseMode = False