chore: cleanup some hal.h entries in favor of JSON (#7722)

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
Co-authored-by: Peter Feerick <5500713+pfeerick@users.noreply.github.com>

radio/util/hw_defs/hal_pwm_sticks.jinja

@@ -0,0 +1,11 @@
+//
+// WARNING: DO NOT EDIT THIS FILE
+//   This file has been generated from the target's JSON hardware description
+//
+
+#pragma once
+
+{% set pwm_sticks = adc_inputs.inputs | selectattr('type', '==', 'STICK') | selectattr('pwm_channel', 'ne', none) | list %}
+{% for gpio, inputs in pwm_sticks | groupby('gpio') %}
+#define PWM_{{ gpio }}_PINS ({{ inputs | map(attribute='pin') | join(' | ') }})
+{% endfor %}