Remove baseUrl from tsconfig.json

[sickhippie]

As of TypeScript 4.1, baseUrl is no longer required to be set when using paths.

https://www.typescriptlang.org/tsconfig/#baseUrl

In TypeScript 7.0, we are not reimplementing baseUrl.
Instead, paths will need to manually specify a custom prefix.

In TypeScript 6.0, we will be deprecating this behavior. Using baseUrl will lead to an error which can only be resolved by applying one of the above fixes, or using --ignoreDeprecations.

microsoft/TypeScript#62207