Replace NonCopyable in CAN inheritance.

This commit moves the deletion of copy constructor and copy assignment operators to the `mbed::interface::can` class, where both `mbed::CAN` and `mbed::interface::CAN` inherit enum types from. This allows `NonCopyable` to be removed from the inheritance list.

Author: AGlass0fMilk

drivers/include/drivers/CAN.h

@@ -25,7 +25,6 @@
 #include "hal/can_api.h"
 #include "platform/Callback.h"
 #include "platform/PlatformMutex.h"
-#include "platform/NonCopyable.h"
 
 namespace mbed {
 
@@ -39,9 +38,9 @@ namespace mbed {
  */
 class CAN
 #ifdef FEATURE_EXPERIMENTAL_API
-    final : public interface::CAN, private NonCopyable<CAN>
+    final : public interface::CAN
 #else
-    : private NonCopyable<CAN>, public interface::can
+    : public interface::can
 #endif
 {
 

drivers/include/drivers/interfaces/InterfaceCAN.h

@@ -145,8 +145,12 @@ struct can {
 protected:
     can() = default;
     ~can() = default;
-    can(const can &) = default;
-    can &operator=(const can &) = default;
+
+public:
+
+    /* Copy constructor and copy assignment operators will be deleted in subclasses as well */
+    can(const can &) = delete;
+    can &operator=(const can &) = delete;
 
 };