Revert "V0.3.7: [updated] StorageTest to test Task, DeadlineTask, FloatingTask."

This reverts commit 3133418dbe86ff95765923fa949c83b6c9e1769d.
Merge branch 'master' of https://github.com/cs2103aug2014-f10-2j/main

# By Eric
# Via Eric
* 'master' of https://github.com/cs2103aug2014-f10-2j/main:
  Revert "V0.2 [updated] Fixed .clone() in Task classes."
  V0.2 [updated] Fixed .clone() in Task classes.