Remove absolute frequency from handler parameters

None of the current handlers really need it and with temperature
compensation enabled it would be necessary to undo the compensation
before passing it to the handlers.

local.h

@@ -68,10 +68,6 @@ extern void LCL_GetOffsetCorrection(struct timeval *raw, double *correction, dou
    dfreq : delta frequency relative to previous value (in terms of
    seconds gained by system clock per unit system clock time)
 
-   afreq : absolute frequency relative to uncompensated system (in
-   terms of ppm seconds gained by system clock per unit of the
-   uncalibrated system clock)
-
    doffset : delta offset applied (positive => make local system fast
    by that amount, negative => make it slow by that amount)
 
@@ -83,7 +79,7 @@ extern void LCL_GetOffsetCorrection(struct timeval *raw, double *correction, dou
 
 typedef void (*LCL_ParameterChangeHandler)
      (struct timeval *raw, struct timeval *cooked,
-      double dfreq, double afreq_ppm,
+      double dfreq,
       double doffset, int is_step_change,
       void *anything
       );