Update metrics.md

Author: ahhyoushh

wiki/metrics.md

@@ -238,7 +238,7 @@ The consistency of keyword superiority across NCERT and STEM datasets (academic
 1. **Dataset Size:** Evaluation limited to <100 files per dataset
 2. **Domain Coverage:** Primarily academic content
 3. **Language:** English-only evaluation
-4. **Model:** Single embedding model tested (all-mpnet-base-v2)
+
 
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