An endpoint to delete an allergy from a user was added

...t2016/v233/SmartMat/controller/group/WasteController.java

...tnu/idatt2016/v233/SmartMat/dto/request/WasteRequest.java

src/main/java/ntnu/idatt2016/v233/SmartMat/entity/Waste.java

...t2016/v233/SmartMat/repository/group/WasteRepository.java

.../idatt2016/v233/SmartMat/service/group/FridgeService.java

...u/idatt2016/v233/SmartMat/service/group/WasteService.java

.../java/ntnu/idatt2016/v233/SmartMat/util/CategoryUtil.java

...6/v233/SmartMat/controller/group/WasteControllerTest.java

...6/v233/SmartMat/repository/group/WasteRepositoryTest.java

...att2016/v233/SmartMat/service/group/WasteServiceTest.java

...ava/ntnu/idatt2016/v233/SmartMat/util/StatisticUtils.java