Remove unused WASM memory export

[sug0]

Describe your changes

The wasm execution environment instantiated a block of memory that went unused by txs/vps. In this PR, we remove the code that instantiated that memory block.

Indicate on which release or other PRs this topic is based on

v0.35.1

Checklist before merging to draft

• [x] I have added a changelog
• [x] Git history is in acceptable state

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 60.23%. Comparing base (4ed6229) to head (8362b9a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3258      +/-   ##
==========================================
- Coverage   60.24%   60.23%   -0.02%     
==========================================
  Files         303      303              
  Lines       93191    93183       -8     
==========================================
- Hits        56145    56126      -19     
- Misses      37046    37057      +11     

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