audio: remove mp_chmap_contains()

It's unsued now.

audio/chmap.c

@@ -417,16 +417,6 @@ int mp_chmap_diffn(const struct mp_chmap *a, const struct mp_chmap *b)
     return diff.num;
 }
 
-// Checks whether a contains all the speakers in b
-bool mp_chmap_contains(const struct mp_chmap *a, const struct mp_chmap *b)
-{
-    struct mp_chmap d1;
-    struct mp_chmap d2;
-    mp_chmap_diff(a, b, &d1);
-    mp_chmap_diff(b, a, &d2);
-    return a->num >= b->num && d1.num >= 0 && d2.num == 0;
-}
-
 // Returns something like "fl-fr-fc". If there's a standard layout in lavc
 // order, return that, e.g. "3.0" instead of "fl-fr-fc".
 // Unassigned but valid speakers get names like "sp28".

audio/chmap.h

@@ -127,8 +127,6 @@ void mp_chmap_diff(const struct mp_chmap *a, const struct mp_chmap *b,
                    struct mp_chmap *diff);
 int mp_chmap_diffn(const struct mp_chmap *a, const struct mp_chmap *b);
 
-bool mp_chmap_contains(const struct mp_chmap *a, const struct mp_chmap *b);
-
 char *mp_chmap_to_str_buf(char *buf, size_t buf_size, const struct mp_chmap *src);
 #define mp_chmap_to_str(m) mp_chmap_to_str_buf((char[64]){0}, 64, (m))
 

test/chmap.c

@@ -24,33 +24,9 @@ static void test_mp_chmap_diff(void **state) {
     assert_int_equal(diff.speaker[2], MP_SPEAKER_ID_BC);
 }
 
-static void test_mp_chmap_contains_with_related_chmaps(void **state) {
-    struct mp_chmap a;
-    struct mp_chmap b;
-
-    mp_chmap_from_str(&a, bstr0("3.1"));
-    mp_chmap_from_str(&b, bstr0("2.1"));
-
-    assert_true(mp_chmap_contains(&a, &b));
-    assert_false(mp_chmap_contains(&b, &a));
-}
-
-static void test_mp_chmap_contains_with_unrelated_chmaps(void **state) {
-    struct mp_chmap a;
-    struct mp_chmap b;
-
-    mp_chmap_from_str(&a, bstr0("mono"));
-    mp_chmap_from_str(&b, bstr0("stereo"));
-
-    assert_false(mp_chmap_contains(&a, &b));
-    assert_false(mp_chmap_contains(&b, &a));
-}
-
 int main(void) {
     const UnitTest tests[] = {
         unit_test(test_mp_chmap_diff),
-        unit_test(test_mp_chmap_contains_with_related_chmaps),
-        unit_test(test_mp_chmap_contains_with_unrelated_chmaps),
     };
     return run_tests(tests);
 }