Small corrections to set the number of the frame to be extracted from raw file

rtengine/rawimage.h

@@ -307,13 +307,6 @@ public:
         return zero_is_bad == 1 ? true : false;
     }
 
-    void setFrameNumber(unsigned int frameNum) {
-        // a single raw file can contain more than one frame.
-        // Variable is_raw holds the number of frames in the raw file
-        // use setFrameNumber() to set the number of the frame [0; is_raw - 1] to be processed
-        shot_select = std::min(std::max(is_raw, 1u) - 1, frameNum);
-    }
-
 public:
     // dcraw functions
     void scale_colors()