strmap: make callers of strmap_remove() to call it in void context

Two "static inline" functions, both of which return void, call
strmap_remove() and tries to return the value it returns as their
return value, which is just bogus, as strmap_remove() returns void
itself.  Call it in the void context and fall-thru the control to
the end instead.

Reported-by: Randall S. Becker <rsbecker@nexbridge.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

strmap.h

@@ -165,7 +165,7 @@ static inline int strintmap_contains(struct strintmap *map, const char *str)
 
 static inline void strintmap_remove(struct strintmap *map, const char *str)
 {
-	return strmap_remove(&map->map, str, 0);
+	strmap_remove(&map->map, str, 0);
 }
 
 static inline int strintmap_empty(struct strintmap *map)
@@ -249,7 +249,7 @@ static inline int strset_contains(struct strset *set, const char *str)
 
 static inline void strset_remove(struct strset *set, const char *str)
 {
-	return strmap_remove(&set->map, str, 0);
+	strmap_remove(&set->map, str, 0);
 }
 
 static inline int strset_empty(struct strset *set)