fix(eslint-config): disable react/prop-types in TypeScript files

TypeScript files don't need to check `react/prop-types`, so this disables that rule in them.

Author: Josh Goldberg

packages/eslint-config/rules/typescript.js

@@ -14,6 +14,9 @@ const tsConfig = {
     // These off-by-default or configurable rules are good and we like having them on
     '@typescript-eslint/non-nullable-type-assertion-style': 'error',
     '@typescript-eslint/prefer-optional-chain': 'error',
+
+    // These are no longer necessary now that we have TypeScript
+    'react/prop-types': 'off',
   },
 };