"fixes" material tiles (shiptest-ss13#2603)

<!-- Write **BELOW** The Headers and **ABOVE** The comments else it may
not be viewable. -->
<!-- You can view Contributing.MD for a detailed description of the pull
request process. -->

## About The Pull Request

No longer will you have to see a massive fix me when you accidentally
create material tiles instead of the ones you actually wanted!

Fixes shiptest-ss13#2528

![image](https://github.com/shiptest-ss13/Shiptest/assets/86381784/86c19011-1f17-4129-a75c-de3b38ce130c)

<!-- Describe The Pull Request. Please be sure every change is
documented or this can delay review and even discourage maintainers from
merging your PR! -->

## Why It's Good For The Game

I would argue for scraping them entirely but that fix me sprite was
REALLY annoying me, We have had it for 2 years based on the commit
history
<!-- Please add a short description of why you think these changes would
benefit the game. If you can't justify it in words, it might not be
worth adding. -->

## Changelog

:cl:
fix: Material tile sprites
/:cl:

<!-- Both :cl:'s are required for the changelog to work! You can put
your name to the right of the first :cl: if you want to overwrite your
GitHub username as author ingame. -->
<!-- You can use multiple of the same prefix (they're only used for the
icon ingame) and delete the unneeded ones. Despite some of the tags,
changelogs should generally represent how a player might be affected by
the changes rather than a summary of the PR's contents. -->

code/game/turfs/open/floor.dm

@@ -281,8 +281,6 @@
 	name = "floor"
 	icon_state = "materialfloor"
 	material_flags = MATERIAL_ADD_PREFIX | MATERIAL_COLOR | MATERIAL_AFFECT_STATISTICS
-	icon = 'icons/turf/floors/tiles.dmi'
-	icon_state = "tiled"
 
 /turf/open/floor/material/spawn_tile()
 	for(var/i in custom_materials)