Remove Subgraph link from README

Signed-off-by: jango <77952627+mejango@users.noreply.github.com>

Author: mejango

README.md

@@ -15,7 +15,6 @@
 | -------- | ----------------------------------------------------------------------------------------------------------------------------------- |
 | Mainnet  | https://juicebox.money                                                                                                              |
 | Sepolia  | https://sepolia.juicebox.money                                                                                                      |
-| Subgraph | [https://thegraph.com/explorer/subgraph...](https://thegraph.com/explorer/subgraph?id=FVmuv3TndQDNd2BWARV8Y27yuKKukryKXPzvAS5E7htC) |
 
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