Removed unused Realm dependencies and code from the project

[TheNPDev]

Solve #5 Issues

• Realm was mostly used in the assessment and its related fragments.
• I removed it from there and also removed unused functions of it.
• But there are some functions in these fragments that I left because we can use it when we have to setup them.
• I also left some objects like ResulVisitData but removed all the realm dependency from it because we can also convert it according to the room in future.

@charanpreet-s sir
Check this PR and if there are any problems then please tell me. I'll try to do it accordingly.
This is my assignment for Android intern role.

[charanpreet-s]

Solve #5 Issues

• Realm was mostly used in the assessment and its related fragments.
• I removed it from there and also removed unused functions of it.
• But there are some functions in these fragments that I left because we can use it when we have to setup them.
• I also left some objects like ResulVisitData but removed all the realm dependency from it because we can also convert it according to the room in future.

@charanpreet-s sir Check this PR and if there are any problems then please tell me. I'll try to do it accordingly. This is my assignment for Android intern role.

@TheNPDev, Please attach this PR to the mail thread.