sphear_design_fir_filters: remove leftover comment

calibration/src/sphear_design_fir_filters.m

@@ -45,7 +45,6 @@
 %% frequency response, remez does not converge in my tests
 
 function [FIR IR MPS] = sphear_design_fir_filters(F, n, SR, W, X, Y, Z, U, V, UV_lf_freq, UV_lf_slope, DC_gain_offset_db)
-  %% arbitrary oversampling for FIR length
   if ! exist("Z")
     %% if Z was not supplied, just average X and Y data
     Z = (X + Y) / 2;