Remover arquivos dummies do projeto

Remover as classes collection e item, e todos os arquivos relacionados.

added effort: noob priority: low type: refactor labels

mentioned in merge request !9 (merged)

created merge request !16 (merged) to address this issue

mentioned in merge request !16 (merged)

mentioned in commit 56b0abd0

mentioned in commit 0a9c5b80

mentioned in commit 4b100070

mentioned in commit e5b36158

closed via merge request !16 (merged)