Remove unnecessary imports, standardize others

I used the optimize imports on the dao folder, we can do more in the future, but I figured this was a good chunk to start on. Please test and ensure it passes the same tests as master and we can start getting rid of these code smells.

changed milestone to %Iteration 3

added 146 commits

• 49041f3f...892553bf - 141 commits from branch master
• 73bc4dbd - Merge branch 'UC39' of https://gitlab.engr.illinois.edu/htmoss2/cs427fa20team22 into UC39
• 64bb208e - Merge branch 'UC92v2' of https://gitlab.engr.illinois.edu/htmoss2/cs427fa20team22 into UC92v2
• b9add943 - Run optimize imports on all src files
• ea993001 - Run optimize imports on all test files
• 3f58af9d - Merge branch 'smells' of https://gitlab.engr.illinois.edu/htmoss2/cs427fa20team22 into smells

Compare with previous version

approved this merge request

Xuechen is with me on call, she approves this with me!

merged

mentioned in commit 28977b08