Delete TODO comments that didn't prove to have the performance benfits I thought they would

              break
            }
            if (fileMap.has(`${filename}-${currentCommit.hash}`)) {
              // TODO: maybe cache here as well, so that we don't have to loop as many
              // times next time?
              return fileMap.get(`${filename}-${currentCommit.hash}`)
            }

          blameLines,
        }

// TODO: cache it as deeply in the git history as it can be, so that as many other commits
// benefit from this as possible.
        fileMap.set(key, commit)
        return commit
      },