identical if branches in BaseStateGeometrycpp

[zingale]

what's the purpose of this if test if it always does the same thing?

 301     // set the burning cutoff coordinate on the coarser levels                                                                                                                                   
 302     for (auto n = which_lev - 1; n >= 0; --n) {                                                                                                                                                  
 303         if (burning_cutoff_density_hi_coord(n + 1) % 2 == 0) {                                                                                                                                   
 304             burning_cutoff_density_hi_coord(n) = 0;                                                                                                                                              
 305         } else {                                                                                                                                                                                 
 306             burning_cutoff_density_hi_coord(n) = 0;                                                                                                                                              
 307         }                                                                                                                                                                                        
 308     } ```

[zingale]

these were cleaned up in #419