remove unnecessary casting

include/evalhyd/detail/probabilist/brier.hpp

@@ -164,7 +164,7 @@ namespace evalhyd
                 // determine probability of threshold(s) exceedance
                 // /!\ probability calculation dividing by n (the number of
                 //     members), not n+1 (the number of ranks) like in other metrics
-                return xt::cast<double>(sum_f_k) / n_mbr;
+                return sum_f_k / n_mbr;
             }
         }