Merge pull request #12834 from ZakGriffith/speedrunethereum-tutorials

remove outdated speedrunethereum tutorials

Author: corwintines

src/data/externalTutorials.json

@@ -435,28 +435,6 @@
     "lang": "en",
     "publishDate": "08/25/2021"
   },
-  {
-    "url": "https://github.com/austintgriffith/scaffold-eth/tree/simple-nft-example",
-    "title": "Simple NFT Example",
-    "description": "Build, mint, and send around your own ERC721!",
-    "author": "Austin Griffith",
-    "authorGithub": "https://github.com/austintgriffith",
-    "tags": ["solidity", "smart contracts", "react"],
-    "skillLevel": "beginner",
-    "lang": "en",
-    "publishDate": "08/03/2021"
-  },
-  {
-    "url": "https://github.com/austintgriffith/scaffold-eth/tree/challenge-1-decentralized-staking",
-    "title": "Decentralized Staking App",
-    "description": "Build, test and ship your own decentralized staking app!",
-    "author": "Austin Griffith",
-    "authorGithub": "https://github.com/austintgriffith",
-    "tags": ["solidity", "smart contracts", "react", "testing"],
-    "skillLevel": "beginner",
-    "lang": "en",
-    "publishDate": "08/15/2021"
-  },
   {
     "url": "https://blog.chain.link/fetch-current-crypto-price-data-solidity/",
     "title": "How to Fetch the Current Price of Ethereum in Solidity",