removed one dependency

src/HeightMap.cpp

@@ -1,5 +1,4 @@
 #include <stdexcept>
-#include <stdfloat>
 
 #include <gdal/gdal.h>
 #include "gdal/gdal_priv.h"
@@ -40,4 +39,4 @@ float HeightMap::get_pixel(int x, int y)
     // all the pixels are in an array of floats from left to right, top to bottom
     int offset = ((this->width * y) + x);
     return *(this->data + offset);
-} 
+}