HPUX: Remove all // X aCC comments

These were added to suppress warnings from the HPUX compiler.

src/ca/client/getCallback.cpp

@@ -90,7 +90,7 @@ void getCallback::exception (
     }
 }
 
-void * getCallback::operator new ( size_t ) // X aCC 361
+void * getCallback::operator new ( size_t )
 {
     // The HPUX compiler seems to require this even though no code
     // calls it directly