tests: Bluetooth: Tester: Fix bad BIS sync shift

The shift is an old leftover from when the BAP API was
different and BIT(1) means BIS Index 1, but now BIT(0)
means BIT Index 1.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

tests/bluetooth/tester/src/audio/btp_bap_broadcast.c

@@ -1680,12 +1680,6 @@ uint8_t btp_bap_broadcast_assistant_add_src(const void *cmd, uint16_t cmd_len, v
 		struct bt_bap_bass_subgroup *subgroup = &delegator_subgroups[i];
 
 		subgroup->bis_sync = sys_get_le32(ptr);
-		if (subgroup->bis_sync != BT_BAP_BIS_SYNC_NO_PREF) {
-			/* For semantic purposes Zephyr API uses BIS Index bitfield
-			 * where BIT(1) means BIS Index 1
-			 */
-			subgroup->bis_sync <<= 1;
-		}
 
 		ptr += sizeof(subgroup->bis_sync);
 		subgroup->metadata_len = *ptr;
@@ -1751,12 +1745,6 @@ uint8_t btp_bap_broadcast_assistant_modify_src(const void *cmd, uint16_t cmd_len
 		struct bt_bap_bass_subgroup *subgroup = &delegator_subgroups[i];
 
 		subgroup->bis_sync = sys_get_le32(ptr);
-		if (subgroup->bis_sync != BT_BAP_BIS_SYNC_NO_PREF) {
-			/* For semantic purposes Zephyr API uses BIS Index bitfield
-			 * where BIT(1) means BIS Index 1
-			 */
-			subgroup->bis_sync <<= 1;
-		}
 
 		ptr += sizeof(subgroup->bis_sync);
 		subgroup->metadata_len = *ptr;