Apply some new clippy suggestions

[Robbepop]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 81.48148% with 5 lines in your changes missing coverage. Please review.

Project coverage is 72.25%. Comparing base (6424150) to head (bbc3c67).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/wasmi/src/module/mod.rs	71.42%	2 Missing ⚠️
crates/collections/src/arena/dedup.rs	50.00%	1 Missing ⚠️
crates/collections/src/arena/mod.rs	50.00%	1 Missing ⚠️
crates/wasmi/src/engine/code_map.rs	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1549      +/-   ##
==========================================
- Coverage   72.30%   72.25%   -0.05%     
==========================================
  Files         179      179              
  Lines       16401    16401              
==========================================
- Hits        11858    11851       -7     
- Misses       4543     4550       +7     

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