Windows: Remove 'bAllocatedFcb' from AFSCreate.cpp

Windows: Remove 'bAllocatedFcb' from AFSCreate.cpp

All functions now call AFSInitFcb() and the ObjectInfo->Fcb == NULL
test is performed internally.  Therefore, it is not possible for
the caller to track whether or not an Fcb was allocated.  It is
irrelevant.  The Fcb will be cleaned up when the ObjectInfo is
destroyed by the PrimaryVolumeWorker thread.

Change-Id: I3255563e1b0c44082e4f390002d294ad333d534f
Reviewed-on: http://gerrit.openafs.org/8242
Reviewed-by: Rod Widdowson <rdw@steadingsoftware.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>