Revert "Initialize all ghost item member (Closed #8297)"

[heinrich5991]

This reverts commit f319ed2.

Initializing these variables with junk data doesn't seem to be an improvement over not initializing them. It hides potential Valgrind warnings about data accesses to uninitialized memory though.

f319ed2#r1590801501

Checklist

• Tested the change ingame
• Provided screenshots if it is a visual change
• Tested in combination with possibly related configuration options
• Written a unit test (especially base/) or added coverage to integration test
• Considered possible null pointers and out of bounds array indexing
• Changed no physics that affect existing maps
• Tested the change with ASan+UBSan or valgrind's memcheck (optional)

[ChillerDragon]

So remove this then?

https://github.com/ddnet/ddnet/pull/8288/files#diff-eca12c0a30e25b4b46522ebf89465a03ba72a03f540796c979137931d8f92055R160

Class member variables should be initialized where they are declared

I thought we want to avoid access to uninitliazed memory?