fix clippy warnings

[p-hoffmann]

No description provided.

[Copilot]

Pull Request Overview

This PR addresses clippy warnings by removing an unused variable and its sole usage. The change renames current_exe_name to _current_exe_name (suppressing the unused variable warning) and replaces its usage in a format string with a hardcoded value.

Key Changes

• Renamed current_exe_name to _current_exe_name to indicate it's intentionally unused
• Replaced dynamic executable name in temp directory path with hardcoded "sb-compile-trex"

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[coveralls]

Pull Request Test Coverage Report for Build 18816183413

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.005%) to 37.433%

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Files with Coverage Reduction	New Missed Lines	%
crates/base/src/worker/supervisor/strategy_per_request.rs	2	76.96%
deno/cache/cache_db.rs	2	69.18%

Totals
Change from base Build 18816100372:	-0.005%
Covered Lines:	14808
Relevant Lines:	39559

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💛 - Coveralls