Fix zigbee proxy handlers for new non-virtual dispatch, drop deprecated rp2040 platform key in test

esphome/components/api/api_connection.h

@@ -219,8 +219,8 @@ class APIConnection final : public APIServerConnectionBase {
 #endif
 
 #ifdef USE_ZIGBEE_PROXY
-  void on_zigbee_proxy_frame(const ZigbeeProxyFrame &msg) override;
-  void on_zigbee_proxy_request(const ZigbeeProxyRequest &msg) override;
+  void on_zigbee_proxy_frame(const ZigbeeProxyFrame &msg);
+  void on_zigbee_proxy_request(const ZigbeeProxyRequest &msg);
   void send_zigbee_proxy_frame(const ZigbeeProxyFrame &msg) { this->send_message(msg); }
 #endif
 

tests/components/zigbee_proxy/test.rp2040-ard.yaml

@@ -2,7 +2,4 @@ substitutions:
   tx_pin: GPIO0
   rx_pin: GPIO1
 
-rp2040:
-  board: rpipico
-
 <<: !include common.yaml