Running `deno check` twice in a pure Deno project causes many type checking errors due to generated `.deno` folder in canary

[dsherret]

1. git clone https://github.com/dsherret/gagen
2. cd gagen
3. git checkout 871e8b7f5ff687c7adc37a2bb8bab5ed2ee58ec2
4. deno upgrade canary
5. deno check - Succeeds
6. deno check - Fails

Output:

...
Found 150 errors.

error: Type checking failed.

The generated .deno folder does not spark joy and degrades the experience of working with scripts in Deno.