chore: remove redundant field name

[xla]

This is coming up in automated integrations and in local tooling as
a warning. To reduce the noise it causes we remove the redundant field
assignment.

Ref: https://rust-lang.github.io/rust-clippy/master/#redundant_field_names

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• Referenced an issue explaining the need for the change
• Updated all relevant documentation in docs
• Updated all code comments where relevant
• Wrote tests
• Updated CHANGES.md

[codecov-commenter]

Codecov Report

Merging #408 into master will decrease coverage by 0.0%.
The diff coverage is 5.8%.

@@           Coverage Diff            @@
##           master    #408     +/-   ##
========================================
- Coverage    28.2%   28.2%   -0.1%     
========================================
  Files         130     130             
  Lines        5383    5386      +3     
  Branches     1663    1665      +2     
========================================
  Hits         1519    1519             
- Misses       2795    2798      +3     
  Partials     1069    1069             

Impacted Files	Coverage Δ
light-client/src/fork_detector.rs	0.0% <0.0%> (ø)
light-client/src/light_client.rs	31.0% <ø> (ø)
light-client/src/supervisor.rs	0.0% <0.0%> (ø)
light-client/src/predicates.rs	75.2% <100.0%> (ø)

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[liamsi]

Thanks 🙏