Get rid of unused dependencies in mantis projects

[sundargates]

Context

There are a lot of unused dependencies in various projects in mantis. The goal of this task is to get rid of them, especially in some of the critical projects such as the runtime.

Steps to reproduce

./gradlew nebulaLint should provide hints on which dependencies are unused in a given module.

[cv-prasad]

Hi @sundargates , I am interested in this , Can you please assign me this issue.

[divyam-tripathi]

Hi @sundargates
I have used the suggested nebula-linter for removing the unused dependencies from the project, please checkout the PR #370.
Thanks.

[vishalsingh2972]

@sundargates could you assign this to me if it's still open, after changes made by @divyam-tripathi #368 (comment)