Remove Unused Import statements and variables

[AkshayCHD]

Lot of files have some unused import statements and comments generated by android studio when the file is created, these should be removed.

[championswimmer]

Why have you made a claim for this issue when no BOSS labels were yet attached to it ?
If you want to participate in BOSS, please do properly and in a systematic manner.

Issues will get BOSS labels attached, only after that you are supposed to make a claim.
I am accepting your claim this time, but please keep this in mind in future.

[AkshayCHD]

@championswimmer I am sorry was not aware of the semantics clearly, which I am now will keep this in mind in the future.

[4lch4]

@championswimmer could we get a CONTRIBUTING.md type file that explains the full process so it's easier to follow?

[arya-ayush]

@championswimmer Is this issue under boss right now because I would like to work on it?

[championswimmer]

DO NOT REMOVE AUTHORSHIP COMMENTS FROM TOP OF FILES

[Kerl1310]

Looks like this issue can be closed