Optimize the project directory by deleting unwanted CSS files.

[Ayush Pradhan]

• I checked to make sure that this issue has not already been filed.

• I'm reporting the issue to the correct repository (for multi-repository projects) (optional)

Expected Behavior:

Optimize the project by removing unnecessary CSS files previously used in PostOpportunity form.

Current Behavior:

Many unnecessary CSS files are making the style module cluttered.

Solution:

Delete the unwanted CSS files.

[Ayush Pradhan]

@vaishali614 please assign it.