Removed a doubling of functionality

ipPortUser / lowLevelPortUser are already defined in the sinqMotor
library

src/turboPmacAxis.cpp

@@ -1441,9 +1441,9 @@ asynStatus turboPmacCreateAxis(const char *portName, int axis) {
     if (ptr == nullptr) {
         /*
         We can't use asynPrint here since this macro would require us
-        to get a lowLevelPortUser_ from a pointer to an asynPortDriver.
+        to get an asynUser from a pointer to an asynPortDriver.
         However, the given pointer is a nullptr and therefore doesn't
-        have a lowLevelPortUser_! printf is an EPICS alternative which
+        have an asynUser! printf is an EPICS alternative which
         works w/o that, but doesn't offer the comfort provided
         by the asynTrace-facility
         */