Don't update status LED color on brightness change

Brightness changes now happen when the LED isn't active or
initialized. When not init, CP may crash.

Fixes #5872

Author: tannewt

supervisor/shared/status_leds.c

@@ -324,12 +324,9 @@ uint32_t color_brightness(uint32_t color, uint8_t brightness) {
 void set_status_brightness(uint8_t level) {
     #if CIRCUITPY_STATUS_LED
     rgb_status_brightness = level;
-    uint32_t current_color = current_status_color;
-    // Temporarily change the current color global to force the new_status_color call to update the
-    // LED. Usually duplicate calls of the same color are ignored without regard to brightness
-    // changes.
-    current_status_color = 0;
-    new_status_color(current_color);
+    // This is only called by user code and we're never controlling the status
+    // LED when user code is running. So, we don't need to update the current
+    // state (there is none.)
     #endif
 }