Remove path_compare_func() alias for path_compare()

Non sunt multiplicanda entia sine necessitate.

src/basic/hash-funcs.c

@@ -52,11 +52,7 @@ void path_hash_func(const char *q, struct siphash *state) {
         }
 }
 
-int path_compare_func(const char *a, const char *b) {
-        return path_compare(a, b);
-}
-
-DEFINE_HASH_OPS(path_hash_ops, char, path_hash_func, path_compare_func);
+DEFINE_HASH_OPS(path_hash_ops, char, path_hash_func, path_compare);
 
 void trivial_hash_func(const void *p, struct siphash *state) {
         siphash24_compress(&p, sizeof(p), state);

src/basic/hash-funcs.h

@@ -79,7 +79,6 @@ extern const struct hash_ops string_hash_ops;
 extern const struct hash_ops string_hash_ops_free_free;
 
 void path_hash_func(const char *p, struct siphash *state);
-int path_compare_func(const char *a, const char *b) _pure_;
 extern const struct hash_ops path_hash_ops;
 
 /* This will compare the passed pointers directly, and will not dereference them. This is hence not useful for strings