You may want to delete a view because it no longer serves a purpose or because you want to keep the number of views manageable. You need Edit permission level or higher. to delete a view
Note: Some functionality is introduced gradually to organizations that have opted in to the First Release program. If you're not enrolled in the First Release program, or your administrator has set your view to Classic SharePoint, you may not yet see this feature or it may look different than what is described in the help articles.
Delete a list view
Note: Does your screen look different than the examples here? Your administrator may have classic mode set on the list, or you're using an earlier version. If so, see Create, change, or delete a view of a list or library. If you're a list owner, site owner, or administrator, see Switch the default experience for lists or document libraries from new or classic for the steps to set the default experience.
In the app launcher , click SharePoint, locate and go to the site, and then open the list. If you can’t find the list, click Settings , click Site Contents, and then open the list.
In the Command bar, click View options , and then click Manage views.
If View options is not visible, make sure you are not editing a list or have not selected one or more items. Also, you may not have permission. In that case, contact the Office 365 admin or the site or list owners.
At the bottom of the Settings page, in the Views section, click the view name you want to delete.
At the top of the Edit View page, click Delete.
Note: If Delete is not an option, this may be the default view for the list, and you cannot delete a default view. You need to first create or change modify another view and make it the default.
When prompted to confirm, click OK.