patch 8.1.0443: unnecessary static function prototypes

Problem:    Unnecessary static function prototypes.
Solution:   Remove unnecessary prototypes.
diff --git a/src/eval.c b/src/eval.c
index 358217a..4f457a4 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -232,7 +232,6 @@
 static int eval6(char_u **arg, typval_T *rettv, int evaluate, int want_string);
 static int eval7(char_u **arg, typval_T *rettv, int evaluate, int want_string);
 
-static int eval_index(char_u **arg, typval_T *rettv, int evaluate, int verbose);
 static int get_string_tv(char_u **arg, typval_T *rettv, int evaluate);
 static int get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate);
 static int free_unref_items(int copyID);
@@ -3050,8 +3049,6 @@
  * get_user_var_name().
  */
 
-static char_u *cat_prefix_varname(int prefix, char_u *name);
-
 static char_u	*varnamebuf = NULL;
 static int	varnamebuflen = 0;
 
@@ -7957,6 +7954,7 @@
 	if (defstr != NULL)
 	{
 	    int save_ex_normal_busy = ex_normal_busy;
+
 	    ex_normal_busy = 0;
 	    rettv->vval.v_string =
 		getcmdline_prompt(secret ? NUL : '@', p, echo_attr,
@@ -8507,8 +8505,6 @@
     VAR_FLAVOUR_VIMINFO		/* all uppercase */
 } var_flavour_T;
 
-static var_flavour_T var_flavour(char_u *varname);
-
     static var_flavour_T
 var_flavour(char_u *varname)
 {
@@ -9431,9 +9427,6 @@
 /*
  * Functions for ":8" filename modifier: get 8.3 version of a filename.
  */
-static int get_short_pathname(char_u **fnamep, char_u **bufp, int *fnamelen);
-static int shortpath_for_invalid_fname(char_u **fname, char_u **bufp, int *fnamelen);
-static int shortpath_for_partial(char_u **fnamep, char_u **bufp, int *fnamelen);
 
 /*
  * Get the short path (8.3) for the filename in "fnamep".