Fix: signals are not allowed to be (pure) virtual functions.

include/hwapi.h

@@ -1305,35 +1305,31 @@ public:
 
 
 
-
 signals:
-    void hwapi_templatePrintFinished_OK(void) const override;
-    void hwapi_templatePrintFinished_Err(void) const override;
+    // already declared in interfaces.h
+    void hwapi_templatePrintFinished_OK(void) const;
+    void hwapi_templatePrintFinished_Err(void) const;
 
-    void hwapi_coinCollectionJustStarted(void) const override;
-    void hwapi_coinCollectionAborted(void) const override;
+    void hwapi_coinCollectionJustStarted(void) const;
+    void hwapi_coinCollectionAborted(void) const;
 
-    void hwapi_gotNewCoin(void) const override;
-    void hwapi_payStopByMax(void) const override;
-    void hwapi_payStopByPushbutton(void) const override;
+    void hwapi_gotNewCoin(void) const;
+    void hwapi_payStopByMax(void) const;
+    void hwapi_payStopByPushbutton(void) const;
 
-    void hwapi_payStopByEscrow(void) const override;
-    void hwapi_payStopByError(void) const override;
-    void hwapi_payStopByTimeout(void) const override;
-    void hwapi_payCancelled(void) const override;
-    void hwapi_coinProcessJustStopped(void) const override;
+    void hwapi_payStopByEscrow(void) const;
+    void hwapi_payStopByError(void) const;
+    void hwapi_payStopByTimeout(void) const;
+    void hwapi_payCancelled(void) const;
+    void hwapi_coinProcessJustStopped(void) const;
 
     // new from 2023.06.12
-    void hwapi_doorServiceDoorOpened(void) const override;
-    void hwapi_doorVaultDoorOpened(void) const override;
-    void hwapi_doorCoinBoxRemoved(void) const override;
-    void hwapi_doorCoinBoxInserted(void) const override;
-    void hwapi_doorCBinAndAllDoorsClosed(void) const override;
-    void hwapi_doorAllDoorsClosed(void) const override;
-
-
-
-
+    void hwapi_doorServiceDoorOpened(void) const;
+    void hwapi_doorVaultDoorOpened(void) const;
+    void hwapi_doorCoinBoxRemoved(void) const;
+    void hwapi_doorCoinBoxInserted(void) const;
+    void hwapi_doorCBinAndAllDoorsClosed(void) const;
+    void hwapi_doorAllDoorsClosed(void) const;
 
  private slots:
     //void hwapi_slotPrintFinished_OK(void);