Remove broken links/deprecated resources from web design (#737)

WebDesignResources.md

@@ -36,8 +36,6 @@
 
 ## Images & Video
 
-- [AllTheFreeStock](http://allthefreestock.com/): A central place to search for free stock photos and videos.
-
 - [Coverr](https://coverr.co/): Free stock videos to add to your websites.
 
 - [Gratisography](https://gratisography.com/): Another source of free stock photos.
@@ -77,9 +75,6 @@
 
 - [Isorepublic](https://isorepublic.com/): Thousands of Free High-Resolution CC0 Photos and Videos.
 
-- [Plixs](https://wallpapers.io/):
-  Beautiful High Definition HD Wallpapers.
-
 - [Librestock](https://librestock.com/): Thousands of Free High-Resolution CC0 Photos and Videos.
 
 - [Visualhunt](https://visualhunt.com/): Free high quality stock photos.
@@ -143,7 +138,7 @@
 
 - [Iconfinder](https://www.iconfinder.com/): A listing of free and not-free web icons.
 
-- [Icongram](https://icongr.am/): A fantastic meta-repository allowing anybody to get "6836 icons on the fly", pooling from other well-known logo platforms like [Font Awesome](https://fontawesome.com/), [Material Design](https://material.io/tools/icons/?style=baseline), [Devicon](https://konpa.github.io/devicon/), [Clarity](https://vmware.github.io/clarity/icons/icon-sets), [Octicons](https://octicons.github.com/) and much more.
+- [Icongram](https://icongr.am/): A fantastic meta-repository allowing anybody to get "6836 icons on the fly", pooling from other well-known logo platforms like [Font Awesome](https://fontawesome.com/), [Material Design](https://material.io/tools/icons/?style=baseline), [Clarity](https://vmware.github.io/clarity/icons/icon-sets), [Octicons](https://octicons.github.com/) and much more.
 
 - [Ionic](https://useiconic.com/): A collection of simple web icons. There is a free set of 223 icons as well as a larger set you can pay for.