Avoid explicitly deleting the `tsconfig.tsbuildinfo` files

[pomerantsev]

I now have to use a script that deletes these files:

accented/package.json

Line 9 in d4d55c3

"clean-tsbuildinfo": "rm -f packages/accented/tsconfig.tsbuildinfo tsconfig.test.tsbuildinfo",

This may not be necessary, but without it something doesn't rebuild correctly, leading to a broken DX. Use this as an opportunity to better understand what this file is and how TypeScript works in general.