BaseTools: Remove redundant binary cache file

BaseTools: Remove redundant binary cache file

Redesign the binary cache and not need to save the
cache intermediate result and state in memory as a
ModuleBuildCacheIR class instance. So remove the
CacheIR.py which define the ModuleBuildCacheIR class.

Signed-off-by: Steven Shi <steven.shi@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Bob Feng <bob.c.feng@intel.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>