This committee exists in name only — it doesn't actually function.
Tips
history
Echoes 《国语·晋语》: 吾有卿之名而无其实 — 'I have the title of minister but not the reality.' The contrast 名/实 (name vs. substance) is a classical philosophical pair.
grammar
Common patterns: X 有名无实 ('X is nominal'), or 有名无实的 X ('a nominal X'). Frequently applied to titles, organizations, agreements, or relationships.