Remove Europa From Map Pool (#1380)

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# Description

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There are a _lot_ of issues surrounding Europa, which include, but the
big two are:
- How many complaints I'm receiving about it in general.
- Engineering issues, including a lack of an alternative beyond an SM
(supposedly)
- Lacking a cryosleep area.
- Distro air and waste are connected together.
- More here
#1379 (comment)

Is there a way we can add people to review maps specifically? I'm not a
mapper, but the last few maps that have gotten through have been _bad_
at the start.

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# Changelog

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:cl:
- remove: *Temporarily* removed Europa from map pool, pending some
refurbishing.

Resources/Prototypes/Maps/Pools/default.yml

@@ -16,4 +16,4 @@
   - TheHive
   - Gax
   - Rad
-  - Europa
+#  - Europa