config: get rid of a useless asignment

src/config_file.c

@@ -268,12 +268,10 @@ static int config_iterator_next(
 	diskfile_backend *b = (diskfile_backend *) it->parent.backend;
 	int err = 0;
 	cvar_t * var;
-	const char* key;
 
 	if (it->next_var == NULL) {
-		err = git_strmap_next(&key, (void**) &var, &(it->iter), b->values);
+		err = git_strmap_next((void**) &var, &(it->iter), b->values);
 	} else {
-		key = it->next_var->entry->name;
 		var = it->next_var;
 	}
 

src/strmap.c

@@ -8,7 +8,6 @@
 #include "strmap.h"
 
 int git_strmap_next(
-	const char **key,
 	void **data,
 	git_strmap_iter* iter,
 	git_strmap *map)
@@ -22,7 +21,6 @@ int git_strmap_next(
 			continue;
 		}
 
-		*key = git_strmap_key(map, *iter);
 		*data = git_strmap_value_at(map, *iter);
 
 		++(*iter);

src/strmap.h

@@ -68,7 +68,6 @@ typedef khiter_t git_strmap_iter;
 #define git_strmap_end		kh_end
 
 int git_strmap_next(
-	const char **key,
 	void **data,
 	git_strmap_iter* iter,
 	git_strmap *map);