Drop unused return value from claim_funds_from_hop

[TheBlueMatt]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.91%. Comparing base (07f3380) to head (fea6393).

Files	Patch %	Lines
lightning/src/ln/channelmanager.rs	90.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3128      +/-   ##
==========================================
- Coverage   89.92%   89.91%   -0.01%     
==========================================
  Files         121      121              
  Lines       99172    99164       -8     
  Branches    99172    99164       -8     
==========================================
- Hits        89180    89163      -17     
- Misses       7391     7395       +4     
- Partials     2601     2606       +5     

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[valentinewallace]

Nice cleanup, it's trivial so gonna land