Index: firmware/App/Controllers/ROPump.c
===================================================================
diff -u -re56a0b7c6fcae8ee61d247b3d89ea1874782eb0d -r52763239a17119a1ffab1fb53e8eedf992ae800c
--- firmware/App/Controllers/ROPump.c	(.../ROPump.c)	(revision e56a0b7c6fcae8ee61d247b3d89ea1874782eb0d)
+++ firmware/App/Controllers/ROPump.c	(.../ROPump.c)	(revision 52763239a17119a1ffab1fb53e8eedf992ae800c)
@@ -72,8 +72,6 @@
  /// Initial conversion factor from target flow rate to PWM duty cycle estimate.
 #define ROP_FLOW_TO_PWM_DC(flow)                       ( ROP_FLOW_TO_PWM_SLOPE * flow + ROP_FLOW_TO_PWM_INTERCEPT )
 
-#define FLOW_SENSOR_ZERO_READING                       0xFFFF                                      ///< Flow sensor reading indicates zero flow (or flow lower than can be detected by sensor).
-
 #define MAX_ALLOWED_FLOW_DEVIATION                     0.1                                         ///< Max allowed deviation from target flow.
 #define FLOW_OUT_OF_RANGE_PERSISTENT_INTERVAL          ( 12 * MS_PER_SECOND )                      ///< Flow out of range time out in counts.
 #define MAX_PRESSURE_TARGET_TOLERANCE                  5                                           ///< Pressure tolerance from maximum set pressure by user in psi.