diff --git a/modules/gpu/src/generalized_hough.cpp b/modules/gpu/src/generalized_hough.cpp
index 6f48161c9..e8471094f 100644
--- a/modules/gpu/src/generalized_hough.cpp
+++ b/modules/gpu/src/generalized_hough.cpp
@@ -675,28 +675,6 @@ namespace
     /////////////////////////////////////////
     // POSITION & SCALE & ROTATION
 
-    double toRad(double a)
-    {
-        return a * CV_PI / 180.0;
-    }
-
-    double clampAngle(double a)
-    {
-        double res = a;
-
-        while (res > 360.0)
-            res -= 360.0;
-        while (res < 0)
-            res += 360.0;
-
-        return res;
-    }
-
-    bool angleEq(double a, double b, double eps = 1.0)
-    {
-        return (fabs(clampAngle(a - b)) <= eps);
-    }
-
     class GHT_Guil_Full : public GHT_Pos
     {
     public: