Removed old cruft from documentation.

src/Camera.h

@@ -49,7 +49,7 @@ class MAGNUM_EXPORT Camera: public Object {
          * @param parent        Parent object
          *
          * Sets orthographic projection to the default OpenGL cube (range
-         * @f$ [-1; 1] @f$ in all directions) and clear color to black.
+         * @f$ [-1; 1] @f$ in all directions).
          * @see setOrthographic(), setPerspective()
          */
         Camera(Object* parent = nullptr);