Remove unusing types at base

[NicholasWon47]

No description provided.

[codecov]

Codecov Report

Merging #26 into develop will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           develop      #26   +/-   ##
========================================
  Coverage    95.08%   95.08%           
========================================
  Files           14       14           
  Lines          468      468           
========================================
  Hits           445      445           
  Misses          23       23

Impacted Files	Coverage Δ
adopy/base/_task.py	100% <100%> (ø)	⬆️
adopy/base/_engine.py	93.57% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 64e56a4...3037301. Read the comment docs.

[NicholasWon47]

Hope this help. btw your code is quite neat 👍

happy to contribute! :)