Выброс ошибки в API методах, если метод не привязан к навыку

[K1rL3s]

Описание

Убрал ненужную (и к тому же ошибочную) привязку метода к навыку
Сделал выброс ошибки, если пытаться получить ссылку без привязанного навыка

Тип изменения

• Исправление бага (некритическое изменение, которое устраняет проблему)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.92%. Comparing base (f3f8556) to head (88400b0).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #17   +/-   ##
=======================================
  Coverage   99.92%   99.92%           
=======================================
  Files         140      140           
  Lines        2608     2619   +11     
=======================================
+ Hits         2606     2617   +11     
  Misses          2        2           

Flag	Coverage Δ
unittests	99.92% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
aliceio/exceptions.py	100.00% <100.00%> (ø)
aliceio/methods/base.py	100.00% <100.00%> (ø)
aliceio/methods/images/delete_image.py	100.00% <100.00%> (ø)
aliceio/methods/images/get_images.py	100.00% <100.00%> (ø)
aliceio/methods/images/upload_image.py	100.00% <100.00%> (ø)
aliceio/methods/sounds/delete_sound.py	100.00% <100.00%> (ø)
aliceio/methods/sounds/get_sounds.py	100.00% <100.00%> (ø)
aliceio/methods/sounds/upload_sound.py	100.00% <100.00%> (ø)