Remove unused time attribute aggregation classes from uc4 kafkaStreams app

...rc/main/java/spesb/uc4/streamprocessing/DayOfWeekKey.java

.../java/spesb/uc4/streamprocessing/DayOfWeekKeyFactory.java

...in/java/spesb/uc4/streamprocessing/DayOfWeekKeySerde.java

...va/spesb/uc4/streamprocessing/DayOfWeekRecordFactory.java

...c/main/java/spesb/uc4/streamprocessing/HourOfWeekKey.java

...java/spesb/uc4/streamprocessing/HourOfWeekKeyFactory.java

...n/java/spesb/uc4/streamprocessing/HourOfWeekKeySerde.java

...a/spesb/uc4/streamprocessing/HourOfWeekRecordFactory.java

...main/java/spesb/uc4/streamprocessing/TopologyBuilder.java