fix duplicate section and wrong link (#162)

* fix duplicate section and wrong link

* fix

Author: SahilAujla

fern/docs.yml

@@ -2336,23 +2336,15 @@ navigation:
           - api: Abstract API Endpoints
             api-name: abstract
         slug: abstract
-      - section: 📒 opBNB (Paid Tier)
+      - section: 📒 opBNB
         contents:
           - page: opBNB Chain API Quickstart
             path: api-reference/opbnb-paid-tier/opbnb-chain-api-quickstart.mdx
           - page: opBNB Chain API FAQ
             path: api-reference/opbnb-paid-tier/opbnb-chain-api-faq.mdx
           - api: OpBNB API Endpoints
             api-name: opBNB
-        slug: opbnb-paid-tier
-      - section: 💸 Transfers API (Tx History)
-        contents:
-          - page: Transfers API Endpoints
-            path: >-
-              api-reference/transfers-api-tx-history/alchemy-getassettransfers.mdx
-          - api: Transfers API Endpoints
-            api-name: transfers
-        slug: transfers-api-tx-history
+        slug: opbnb
       - section: 🟨 BNB SMART CHAIN
         contents:
           - page: BNB Smart Chain Quickstart