Removing Polygon (#252)

* Removing Polygon

* Removing images

Author: MichaelMacaulay

pages/en/network-transition-faq.mdx

@@ -210,18 +210,18 @@ Minimize the use of smart contract calls within the subgraph. Accessing a smart
 
 Yes, multisig support has recently been added. You can find more information [here](https://thegraph.com/docs/studio/multisig).
 
-### What are the contract addresses for GRT on Ethereum and Polygon?
+### What are the contract addresses for GRT on Ethereum and Arbitrum?
 
 - Ethereum: `0xc944E90C64B2c07662A292be6244BDf05Cda44a7`
-- Polygon: `0x5fe2B58c013d7601147DcdD68C143A77499f5531`
+- Arbitrum: `0x9623063377AD1B27544C965cCd7342f7EA7e88C7`
 
 ### How much GRT do projects usually keep in their API Key?
 
 Many projects keep 30-60 days worth of GRT in their API key, so they don't need to refill often. To understand what your 30-60 day GRT fees would be, please reach out [here](mailto:[email protected]).
 
 ### How are query payments made on the decentralized network? 
 
-Fees are invoiced weekly and pulled out of a user's API Key, with GRT that is bridged to and sits on Polygon
+Fees are invoiced weekly and pulled out of a user's API Key, with GRT that is bridged to and sits on Arbitrum.
 
 ### How are API keys used for subgraphs on the decentralized network?