Added destructors for the classes in order to use the PIMPL idiom with

uniqe_ptr

src/sinqAxis.h

@@ -24,6 +24,13 @@ class epicsShareClass sinqAxis : public asynMotorAxis {
      */
     sinqAxis(class sinqController *pC_, int axisNo);
 
+    /**
+     * @brief Destroy the sinqAxis object
+     *
+     * This destructor is necessary in order to use the PIMPL idiom.
+     */
+    ~sinqAxis();
+
     /**
      * @brief Perform some standardized operations before and after the concrete
     `doPoll` implementation.