patch 8.1.1978: the eval.c file is too big

Problem:    The eval.c file is too big.
Solution:   Move filter() and map() to list.c.
diff --git a/src/proto/eval.pro b/src/proto/eval.pro
index b91774b..9ab1ade 100644
--- a/src/proto/eval.pro
+++ b/src/proto/eval.pro
@@ -11,8 +11,6 @@
 char_u *eval_to_string(char_u *arg, char_u **nextcmd, int convert);
 char_u *eval_to_string_safe(char_u *arg, char_u **nextcmd, int use_sandbox);
 varnumber_T eval_to_number(char_u *expr);
-list_T *eval_spell_expr(char_u *badword, char_u *expr);
-int get_spellword(list_T *list, char_u **pp);
 typval_T *eval_expr(char_u *arg, char_u **nextcmd);
 int call_vim_function(char_u *func, int argc, typval_T *argv, typval_T *rettv);
 varnumber_T call_func_retnr(char_u *func, int argc, typval_T *argv);
@@ -78,5 +76,4 @@
 char_u *typval_tostring(typval_T *arg);
 int modify_fname(char_u *src, int tilde_file, int *usedlen, char_u **fnamep, char_u **bufp, int *fnamelen);
 char_u *do_string_sub(char_u *str, char_u *pat, char_u *sub, typval_T *expr, char_u *flags);
-void filter_map(typval_T *argvars, typval_T *rettv, int map);
 /* vim: set ft=c : */
diff --git a/src/proto/list.pro b/src/proto/list.pro
index 3102bb2..7a1ce7a 100644
--- a/src/proto/list.pro
+++ b/src/proto/list.pro
@@ -41,4 +41,6 @@
 void list_remove(typval_T *argvars, typval_T *rettv, char_u *arg_errmsg);
 void f_sort(typval_T *argvars, typval_T *rettv);
 void f_uniq(typval_T *argvars, typval_T *rettv);
+void f_filter(typval_T *argvars, typval_T *rettv);
+void f_map(typval_T *argvars, typval_T *rettv);
 /* vim: set ft=c : */