Adopt new BT unpairing standards

app/boards/shields/romac_plus/romac_plus.dtsi

@@ -53,9 +53,6 @@ RC(3,0) RC(3,1) RC(3,2)
 		sensors = <&left_encoder>;
 	};
 	
-	bt_unpair_combo: bt_unpair_combo {
-		compatible = "zmk,bt-unpair-combo";
-	};
 
 	// TODO: per-key RGB node(s)?
 };

app/boards/shields/romac_plus/romac_plus.keymap

@@ -5,6 +5,7 @@
  */
 
 #include <behaviors.dtsi>
+#include <dt-bindings/zmk/bt.h>
 #include <dt-bindings/zmk/keys.h>
 
 / {
@@ -30,13 +31,13 @@
 
         // nav_layer {
 // -----------------------
-// | _ |  HOME  |  PGUP  |
+// | BT_CLR |  HOME  |  PGUP  |
 // | _ |  END   |  PGDN  |
 // | _ |  _     |  _     |
 // | _ |  _     |  RET   |
 // -----------------------
     //         bindings = <
-    // &trans &kp HOME &kp PGUP 
+    // &bt BT_CLR &kp HOME &kp PGUP 
     // &trans &kp END  &kp PGDN 
     // &trans &trans   &trans .0
     // &trans &trans   &kp RET