adds a simple rate calculation

src/asynStreamGeneratorDriver.h

@@ -56,15 +56,6 @@ struct __attribute__((__packed__)) MonitorEvent {
 /*******************************************************************************
  * Simplified Event Struct Definition
  */
-struct __attribute__((__packed__)) NormalisedMonitorEvent {
-    uint64_t TimeStamp;
-    uint8_t DataID : 4;
-};
-
-struct __attribute__((__packed__)) NormalisedDetectorEvent {
-    uint64_t TimeStamp;
-    uint32_t PixID;
-};
 
 struct __attribute__((__packed__)) NormalisedEvent {
     uint64_t timestamp;