No longer support Ropsten and Rinkeby testnets

Both testnets are soon to be deprecated
(https://blog.ethereum.org/2022/06/21/testnet-deprecation). We've transisioned
to using Goerli testnet instead and we no longer need to have any code relating
to Ropsten/Rinkeby.

Author: michalinacienciala

deploy/00_resolve_nucypher_staking_escrow.ts

@@ -26,7 +26,6 @@ const func: DeployFunction = async function (hre: HardhatRuntimeEnvironment) {
   } else if (
     // TODO: For testnets currently we deploy a stub contract. We should consider
     // switching to an actual contract.
-    hre.network.name !== "ropsten" &&
     hre.network.name !== "goerli" &&
     (!hre.network.tags.allowStubs ||
       (hre.network.config as HardhatNetworkConfig)?.forking?.enabled)

deploy/00_resolve_nucypher_token.ts

@@ -21,7 +21,6 @@ const func: DeployFunction = async function (hre: HardhatRuntimeEnvironment) {
   } else if (
     // TODO: For testnets currently we deploy a stub contract. We should consider
     // switching to an actual contract.
-    hre.network.name !== "ropsten" &&
     hre.network.name !== "goerli" &&
     (!hre.network.tags.allowStubs ||
       (hre.network.config as HardhatNetworkConfig)?.forking?.enabled)

hardhat.config.ts

@@ -57,25 +57,6 @@ const config: HardhatUserConfig = {
         : undefined,
       tags: ["etherscan", "tenderly"],
     },
-    rinkeby: {
-      url: process.env.CHAIN_API_URL || "",
-      chainId: 4,
-      accounts: process.env.CONTRACT_OWNER_ACCOUNT_PRIVATE_KEY
-        ? [process.env.CONTRACT_OWNER_ACCOUNT_PRIVATE_KEY]
-        : undefined,
-      tags: ["tenderly"],
-    },
-    ropsten: {
-      url: process.env.CHAIN_API_URL || "",
-      chainId: 3,
-      accounts: process.env.CONTRACT_OWNER_ACCOUNT_PRIVATE_KEY
-        ? [
-            process.env.CONTRACT_OWNER_ACCOUNT_PRIVATE_KEY,
-            process.env.KEEP_CONTRACT_OWNER_ACCOUNT_PRIVATE_KEY,
-          ]
-        : undefined,
-      tags: ["tenderly"],
-    },
     mainnet: {
       url: process.env.CHAIN_API_URL || "",
       chainId: 1,
@@ -111,7 +92,6 @@ const config: HardhatUserConfig = {
       // with `yarn link` command, uncomment the line below to use the linked
       // dependencies.
       // development: ["external/npm/@keep-network/keep-core/artifacts"],
-      ropsten: ["external/npm/@keep-network/keep-core/artifacts"],
       goerli: ["external/npm/@keep-network/keep-core/artifacts"],
       mainnet: ["./external/mainnet"],
     },
@@ -127,7 +107,6 @@ const config: HardhatUserConfig = {
     },
     keepRegistryKeeper: {
       default: 1, // same as the deployer
-      ropsten: "0x923C5Dbf353e99394A21Aa7B67F3327Ca111C67D",
       goerli: "0x68ad60CC5e8f3B7cC53beaB321cf0e6036962dBc",
     },
   },