Revert "sample: basic: blinky_pwm: Exclude rpi_pico w variant"

This reverts commit c47c37d3db876f168f33bb3fa8c28ef8976093b6.

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>
diff --git a/samples/basic/blinky_pwm/sample.yaml b/samples/basic/blinky_pwm/sample.yaml
index c08ec6f..de2cb23 100644
--- a/samples/basic/blinky_pwm/sample.yaml
+++ b/samples/basic/blinky_pwm/sample.yaml
@@ -8,4 +8,3 @@
       - pwm
     depends_on: pwm
     harness: led
-    platform_exclude: rpi_pico/rp2040/w