PID: Remove unused method get_pid_4500

libraries/PID/PID.cpp

@@ -111,12 +111,6 @@ float PID::get_pid(float error, float scaler)
     return output;
 }
 
-int16_t PID::get_pid_4500(float error, float scaler)
-{
-	float v = get_pid(error, scaler);
-	return constrain_float(v, -4500, 4500);
-}
-
 void
 PID::reset_I()
 {

libraries/PID/PID.h

@@ -41,9 +41,6 @@ public:
     ///
     float        get_pid(float error, float scaler = 1.0);
 
-	// get_pid() constrained to +/- 4500
-    int16_t     get_pid_4500(float error, float scaler = 1.0);
-
     /// Reset the PID integrator
     ///
     void        reset_I();