Remove unused btm_read_remote_version_complete_raw

Read remote version event is handled and parsed by GD

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

Ignore-AOSP-First: cherry-pick
Merged-In: I0c98a82b747e6edaa73f2aa2f4462c3ee7144b55
Change-Id: I0c98a82b747e6edaa73f2aa2f4462c3ee7144b55