C-API cleanup: core module tests

modules/core/test/test_allocator.cpp

@@ -2,7 +2,6 @@
 // It is subject to the license terms in the LICENSE file found in the top-level directory
 // of this distribution and at http://opencv.org/license.html.
 #include "test_precomp.hpp"
-#include "opencv2/core/core_c.h" // needed for CV_AUTOSTEP
 
 namespace opencv_test { namespace {