Minimize usages of legacy C API inside the library

modules/softcascade/src/softcascade_init.cpp

@@ -63,22 +63,4 @@ bool initModule_softcascade(void)
     return (sc1->info() != 0) && (sc->info() != 0);
 }
 
-namespace internal {
-void error(const char *error_string, const char *file, const int line, const char *func)
-{
-    int code = CV_GpuApiCallError;
-
-    if (std::uncaught_exception())
-    {
-        const char* errorStr = cvErrorStr(code);
-        const char* function = func ? func : "unknown function";
-
-        std::cerr << "OpenCV Error: " << errorStr << "(" << error_string << ") in " << function << ", file " << file << ", line " << line;
-        std::cerr.flush();
-    }
-    else
-        cv::error( cv::Exception(code, error_string, func, file, line) );
-}
-}
-
 } }