Remove duplicated code

Author: hugodahl

adafruit_progressbar/horizontalprogressbar.py

@@ -149,10 +149,5 @@ def _get_horizontal_fill(
     ) -> Tuple[int, int, int]:
         return _start, _end, _incr
 
-    def _get_vertical_fill(
-        self, _start: int, _end: int, _incr: int
-    ) -> Tuple[int, int, int]:
-        return 0, self.fill_height(), 1
-
     def _invert_fill_direction(self) -> bool:
         return self._direction == HorizontalFillDirection.RIGHT_TO_LEFT

adafruit_progressbar/verticalprogressbar.py

@@ -146,11 +146,6 @@ def _get_value_sizes(self, _old_ratio: float, _new_ratio: float) -> Tuple[int, i
             _new_ratio * self.fill_height()
         )
 
-    def _get_horizontal_fill(
-        self, _start: int, _end: int, _incr: int
-    ) -> Tuple[int, int, int]:
-        return 0, self.fill_width(), 1
-
     def _get_vertical_fill(
         self, _start: int, _end: int, _incr: int
     ) -> Tuple[int, int, int]: