remove dead Architecture B code (topic bloom, filter_table, peer_filters)
- sync.py: remove _build_tag_bloom, _topics_overlap, _topics_overlap_bloom,
tag bloom constants, topic overlap checks in sync_now/_sync_loop/_sync_with
- handlers.py: remove peer_topics_map, tag_bloom, peer_topics, peer_tag_cloud,
filter_table, scoped_query_results from sync response; remove filter_count
from status bar
- db.py: remove peer_filters table creation, store_peer_filter, get_peer_filter,
get_all_filters, get_filtered_peers_by_tag, prune_peer_filters, get_peer_filter_count