chore: remove comment

[sdankel]

Description

Closes #6209
It looks like the compiler actually doesn't cache anything between builds, so this issue can be closed.

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
  • If my change requires substantial documentation changes, I have requested support from the DevRel team
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[github-actions]

Benchmark for 1a0c5fa

Click to view benchmark

Test	Base	PR	%
code_action	5.3±0.38ms	5.3±0.01ms	0.00%
code_lens	285.6±5.10ns	286.8±10.26ns	+0.42%
compile	2.7±0.04s	2.7±0.07s	0.00%
completion	4.7±0.04ms	4.7±0.08ms	0.00%
did_change_with_caching	2.6±0.04s	2.6±0.03s	0.00%
document_symbol	941.4±32.23µs	933.3±44.70µs	-0.86%
format	69.9±0.89ms	69.7±0.75ms	-0.29%
goto_definition	341.9±2.96µs	338.0±5.76µs	-1.14%
highlight	9.1±0.02ms	9.1±0.05ms	0.00%
hover	494.4±5.57µs	496.5±6.47µs	+0.42%
idents_at_position	117.9±0.22µs	117.5±1.24µs	-0.34%
inlay_hints	640.5±10.90µs	646.1±19.19µs	+0.87%
on_enter	2.0±0.02µs	2.0±0.04µs	0.00%
parent_decl_at_position	3.7±0.03ms	3.7±0.03ms	0.00%
prepare_rename	341.9±6.58µs	336.6±4.32µs	-1.55%
rename	9.5±0.50ms	9.4±0.10ms	-1.05%
semantic_tokens	1216.5±9.56µs	1207.7±55.56µs	-0.72%
token_at_position	337.3±1.45µs	331.6±3.37µs	-1.69%
tokens_at_position	3.7±0.15ms	3.7±0.03ms	0.00%
tokens_for_file	407.3±3.89µs	406.6±2.67µs	-0.17%
traverse	34.1±0.59ms	34.2±0.56ms	+0.29%

[github-actions]

Benchmark for 97b6aa3

Click to view benchmark

Test	Base	PR	%
code_action	5.5±0.19ms	5.4±0.02ms	-1.82%
code_lens	284.7±5.49ns	286.5±19.97ns	+0.63%
compile	2.9±0.08s	2.7±0.07s	-6.90%
completion	4.9±0.18ms	4.7±0.04ms	-4.08%
did_change_with_caching	2.7±0.05s	2.6±0.03s	-3.70%
document_symbol	888.8±37.78µs	896.0±27.42µs	+0.81%
format	71.3±2.56ms	70.5±1.05ms	-1.12%
goto_definition	335.5±8.79µs	352.8±9.33µs	+5.16%
highlight	9.1±0.15ms	9.1±0.08ms	0.00%
hover	489.3±6.46µs	504.9±6.20µs	+3.19%
idents_at_position	118.2±1.67µs	117.9±1.05µs	-0.25%
inlay_hints	625.7±22.25µs	643.6±23.59µs	+2.86%
on_enter	1920.4±19.34ns	2.1±0.04µs	+9.35%
parent_decl_at_position	3.7±0.05ms	3.6±0.01ms	-2.70%
prepare_rename	331.3±7.07µs	352.5±9.58µs	+6.40%
rename	9.6±0.18ms	9.4±0.11ms	-2.08%
semantic_tokens	1261.0±24.21µs	1234.5±16.37µs	-2.10%
token_at_position	336.1±2.51µs	342.0±2.14µs	+1.76%
tokens_at_position	3.6±0.02ms	3.7±0.05ms	+2.78%
tokens_for_file	399.6±3.44µs	399.6±2.60µs	0.00%
traverse	35.5±0.97ms	34.9±0.73ms	-1.69%

[github-actions]

Benchmark for 9aa14b7

Click to view benchmark

Test	Base	PR	%
code_action	5.1±0.07ms	5.1±0.04ms	0.00%
code_lens	286.0±14.20ns	286.2±12.11ns	+0.07%
compile	2.7±0.07s	2.6±0.05s	-3.70%
completion	4.5±0.08ms	4.6±0.04ms	+2.22%
did_change_with_caching	2.6±0.05s	2.6±0.03s	0.00%
document_symbol	904.2±43.54µs	853.2±19.94µs	-5.64%
format	70.4±0.92ms	70.9±1.24ms	+0.71%
goto_definition	335.8±3.62µs	341.1±6.10µs	+1.58%
highlight	8.7±0.12ms	8.7±0.12ms	0.00%
hover	489.6±4.99µs	492.0±7.28µs	+0.49%
idents_at_position	119.3±0.22µs	117.8±1.27µs	-1.26%
inlay_hints	626.5±13.59µs	627.3±11.50µs	+0.13%
on_enter	1991.1±69.76ns	2.1±0.05µs	+5.47%
parent_decl_at_position	3.6±0.10ms	3.6±0.04ms	0.00%
prepare_rename	339.1±6.50µs	340.5±5.11µs	+0.41%
rename	9.0±0.15ms	9.0±0.06ms	0.00%
semantic_tokens	1210.1±57.22µs	1252.4±61.95µs	+3.50%
token_at_position	332.2±2.74µs	333.5±2.22µs	+0.39%
tokens_at_position	3.6±0.03ms	3.6±0.04ms	0.00%
tokens_for_file	397.9±2.27µs	400.8±1.97µs	+0.73%
traverse	33.8±0.68ms	34.0±1.26ms	+0.59%