Drop the legacy CMake options.

3.0 seems like an appropriate time to do that.

Author: Roman Donchenko

CMakeLists.txt

@@ -220,10 +220,6 @@ OCV_OPTION(OPENCV_WARNINGS_ARE_ERRORS "Treat warnings as errors"
 # ===================================================
 OCV_OPTION(CMAKE_VERBOSE "Verbose mode" OFF )
 
-# backward compatibility
-# ===================================================
-include(cmake/OpenCVLegacyOptions.cmake OPTIONAL)
-
 
 # ----------------------------------------------------------------------------
 #  Get actual OpenCV version number from sources