How to delete theme wallpapers

[Jeemeli]

So I installed some themes but I didnt like them so I uninstalled them. However the wallpapers from those themes are still in my phone and I cant find them anywhere except if I try to zoom out in my homescreen and press wallpapers, it lets me choose from: gallery, wallpaper or one of these wallpapers I got from the themes. Those wallpapers are rotating as my backround like a slide show and I want to do it with different pictures so I want to get rid of those pictures. My phone is Huawei Honor 7 lite