fix: remove BIS Innovation Hub from member directory

Co-Authored-By: Nakamoto, S <defi@defi-oracle.io>

backend/database/migrations/0017_institutional_membership.up.sql

@@ -63,7 +63,7 @@ CREATE TRIGGER update_institutional_members_updated_at
 -- ============================================================
 -- Corrections from 2026-04 review:
 --   • MLFO is a Global Family Office, NOT a central bank
---   • BIS Innovation Hub does NOT hold observer or any voting seat
+--   • BIS Innovation Hub removed from directory entirely
 --   • Added: ICCC, SAID, PANDA, Order of Hospitallers (XOM)
 --   • Placeholder rows for BRICS founding central banks
 
@@ -89,12 +89,6 @@ VALUES
      'US-CO (Colorado)', NULL,
      39.61, -104.89, 'Greenwood Village, CO'),
 
-    ('bis-innovation-hub', 'BISIH', 'BIS Innovation Hub',
-     'standards_body',
-     'The BIS Innovation Hub is a publicly documented BIS entity whose mandate is to develop public goods in the technology space. DBIS is presented as the output of this Innovation Hub mandate. Does not hold an observer seat or voting rights.',
-     'International (Basel, Switzerland)', NULL,
-     47.55, 7.59, 'Basel, Switzerland'),
-
     -- Added entities
     ('iccc', 'ICCC', 'International Criminal Court of Commerce',
      'oversight_judicial',