Remove unused imports

[vil02]

Bug report for Cloudinary Android SDK

Before proceeding, please update to latest version and test if the issue persists

Describe the bug in a sentence or two.

These classes:

• AdaptToScreenSizeFragment,
• AndroidJobStrategyTest,
• BaseActivity,
• Crop,
• DownloadRequestBuilderStrategy,
• DownloadRequestBuilder,
• ImagePreprocessChain,
• ImageWidgetFragment,
• Limit,
• LocalizationFragment,
• MainActivity,
• MediaManager,
• NoCloudActivity,
• PreprocessChain,
• Rotate,
• SignatureProvider,
• UploadChoiceFragment,
• UploadFragment,
• UploadRequest,
• UploadWidgetFragment,
• UseCasesAdapter,
• UseCasesFragment,
• Utils,
• ValidationException,
• WidgetsFragment,

have some unused imports.

I would like to remove them.

Issue Type (Can be multiple)

[ ] Build - Can’t install or import the SDK
[ ] Performance - Performance issues
[ ] Behaviour - Functions aren’t working as expected (Such as generate URL)
[ ] Documentation - Inconsistency between the docs and behaviour
[x] Other (Specify) - code quality

Related to #173.

[michal-sordyl-cloudinary]

@vil02 Feel free to work on that!