Minor code cleanup

Remove a stray "private", that is not used or needed anymore.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

src/Keyboardio-LEDEffect-Breathe.h

@@ -8,8 +8,6 @@ class LEDBreatheEffect_ : LEDMode {
   LEDBreatheEffect_ (void);
 
   virtual void update (void) final;
-
- private:
 };
 
 extern LEDBreatheEffect_ LEDBreatheEffect;