remove redundant tsconfig settings

Author: lobsterkatie

packages/typescript/tsconfig.json

@@ -9,7 +9,6 @@
     "isolatedModules": true,
     "lib": ["es6", "dom"],
     "moduleResolution": "node",
-    "noEmitHelpers": true,
     "noErrorTruncation": true,
     "noFallthroughCasesInSwitch": true,
     "noImplicitReturns": true,

tsconfig.json

@@ -6,7 +6,6 @@
     "declaration": false,
     "declarationMap": false,
     "skipLibCheck": true,
-    "types": ["node"],
     // Setting this to `false` causes TS to include the full code for each helper it injects, which allows us to remove
     // `tslib` as a dependency, with the advantage that it means we don't have to worry about `tslib` version
     // compatibility with our version of TS. Since we now use Sucrase and Rollup for our main builds, this only affects