Remove legacy HCI_READ_RMT_FEATURES_COMP_EVT

Event is captured by GD and returned to
stack/acl/btm_acl::maybe_chain_more_commands_after_read_remote_version_complete

Command is sent in legacy from
stack/btm/btm_ble_gap::btm_ble_read_remote_features_complete

Bug: 232442249
Tag: #refactor
Test: gd/cert/run
BYPASS_LONG_LINES_REASON: Bluetooth likes 120 lines

Change-Id: Ie809d5725bbf68b6ea25a5442e36392e237a4051