Revert "samples: blinky_pwm: enable pwm_leds in rpi_pico overlay"

This reverts commit 7277cae6fa7c3d0ad567b4f1ef9007dc12e44314.

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>
diff --git a/samples/basic/blinky_pwm/boards/rpi_pico.overlay b/samples/basic/blinky_pwm/boards/rpi_pico.overlay
index 43e054e..c3a3f1f 100644
--- a/samples/basic/blinky_pwm/boards/rpi_pico.overlay
+++ b/samples/basic/blinky_pwm/boards/rpi_pico.overlay
@@ -1,7 +1,3 @@
-&{/pwm_leds} {
-	status = "okay";
-};
-
 &pwm_led0 {
 	status = "okay";
 };