fixed slow down in getRectSubPix (original patch by Markus JR Mueller); removed some unused variables and functions

modules/core/test/test_countnonzero.cpp

@@ -52,9 +52,6 @@ using namespace std;
 
 #define sign(a) a > 0 ? 1 : a == 0 ? 0 : -1
 
-const int FLOAT_TYPE [2] = {CV_32F, CV_64F};
-const int INT_TYPE [5] = {CV_8U, CV_8S, CV_16U, CV_16S, CV_32S};
-
 #define MAX_WIDTH 100
 #define MAX_HEIGHT 100