internal: delete VIR_RETURN_PTR

Remove the macro definition to prevent its usage in new code.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/internal.h

@@ -225,21 +225,6 @@
         (b) = NULL; \
     } while (0)
 
-/**
- * VIR_RETURN_PTR:
- * @ret: pointer to return
- *
- * Returns value of @ret while clearing @ret. This ensures that pointers
- * freed by using VIR_AUTOPTR can be easily passed back to the caller without
- * any temporary variable. @ptr is evaluated more than once.
- */
-#define VIR_RETURN_PTR(ptr) \
-    do { \
-        typeof(ptr) virTemporaryReturnPointer = (ptr); \
-        (ptr) = NULL; \
-        return virTemporaryReturnPointer; \
-    } while (0)
-
 /**
  * virCheckFlags:
  * @supported: an OR'ed set of supported flags