BaseTools/VfrCompile: Remove framework VFR support

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1464

Currently there is no usage of framework VFR,
remove the support from VfrCompile.

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

BaseTools/Source/C/VfrCompile/VfrCompiler.h

@@ -2,7 +2,7 @@
 
   VfrCompiler internal definitions.
 
-Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2004 - 2019, Intel Corporation. All rights reserved.<BR>
 SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -47,7 +47,6 @@ typedef struct {
   CHAR8   *IncludePaths;
   bool    SkipCPreprocessor;
   CHAR8   *CPreprocessorOptions;
-  BOOLEAN CompatibleMode;
   BOOLEAN HasOverrideClassGuid;
   EFI_GUID OverrideClassGuid;
   BOOLEAN WarningAsError;