vim-patch:8.2.4241: some type casts are redundant

Problem:    Some type casts are redundant.
Solution:   Remove the type casts. (closes vim/vim#9643)
420fabcd4f

This is not a literal port but an equivalent one.

src/nvim/version.c

@@ -2093,7 +2093,7 @@ void list_in_columns(char_u **items, int size, int current)
 
   // The rightmost column doesn't need a separator.
   // Sacrifice it to fit in one more column if possible.
-  int ncol = (int)(Columns + 1) / width;
+  int ncol = (Columns + 1) / width;
   int nrow = item_count / ncol + (item_count % ncol ? 1 : 0);
   int cur_row = 1;