Remove watermark integration test

[jewei1997]

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Testing performed to validate your change

[github-actions]

The latest Buf updates on your PR. Results from workflow Buf / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Nov 13, 2025, 3:13 PM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.33%. Comparing base (5ae1ad8) to head (31c218d).
⚠️ Report is 563 commits behind head on main.

❌ Your project check has failed because the head coverage (48.81%) is below the target coverage (50.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2549      +/-   ##
==========================================
- Coverage   43.34%   43.33%   -0.01%     
==========================================
  Files        1576     1576              
  Lines      137842   137842              
==========================================
- Hits        59744    59737       -7     
- Misses      72678    72679       +1     
- Partials     5420     5426       +6     

Flag	Coverage Δ
sei-chain	31.11% <ø> (+0.01%)	⬆️
sei-cosmos	52.55% <ø> (-0.01%)	⬇️
sei-db	47.60% <ø> (ø)
sei-tendermint	48.81% <ø> (-0.04%)	⬇️
sei-wasmd	46.27% <ø> (ø)
sei-wasmvm	40.37% <ø> (ø)

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see 14 files with indirect coverage changes

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[github-actions]

We truly appreciate your contribution and the time you’ve invested in this PR.
Before we can merge it, we’d love your help addressing the remaining feedback or sharing your perspective.
If we don’t hear back within 2 day(s), this PR will close automatically — but don’t worry, you can reopen it anytime when you’re ready to continue.