Chore/remove filters and optimize imports

javadoc/NTNU/IDATT1002/ApplicationState.html

src/main/java/NTNU/IDATT1002/controllers/CreateAlbum.java

src/main/java/NTNU/IDATT1002/controllers/Explore.java

src/main/java/NTNU/IDATT1002/controllers/Login.java

src/main/java/NTNU/IDATT1002/controllers/Search.java

src/main/java/NTNU/IDATT1002/controllers/SignUp.java

src/main/java/NTNU/IDATT1002/controllers/UploadImages.java

src/main/java/NTNU/IDATT1002/controllers/ViewAlbum.java

src/main/java/NTNU/IDATT1002/controllers/ViewPicture.java

src/main/java/NTNU/IDATT1002/filters/AlbumFilter.java

src/main/java/NTNU/IDATT1002/filters/ImageFilter.java

src/main/java/NTNU/IDATT1002/repository/ImageRepository.java

src/main/java/NTNU/IDATT1002/service/ApplicationState.java

src/main/java/NTNU/IDATT1002/service/ImageService.java

src/main/java/NTNU/IDATT1002/service/PdfDocument.java

src/main/java/NTNU/IDATT1002/service/UserService.java

src/main/java/NTNU/IDATT1002/utils/Authentication.java

src/main/java/NTNU/IDATT1002/utils/MetaDataExtractor.java