[Merged by Bors] - Removed a bunch of warnings and clippy errors

[Razican]

This Pull Request fixes some warnings and clips errors. It conflicts with the VM/non-VM PR, so should probably go in first, so that this branch gets properly updated and we get the list of real warnings/errors there.

[codecov]

Codecov Report

Merging #1754 (f72859f) into main (d124c12) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1754   +/-   ##
=======================================
  Coverage   53.03%   53.03%           
=======================================
  Files         200      200           
  Lines       17076    17076           
=======================================
  Hits         9056     9056           
  Misses       8020     8020           

Impacted Files	Coverage Δ
boa/src/environment/lexical_environment.rs	81.81% <ø> (ø)
boa/src/lib.rs	81.57% <ø> (ø)
boa_tester/src/main.rs	0.00% <ø> (ø)

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[github-actions]

Test262 conformance changes

Non-VM implementation

Test result	main count	PR count	difference
Total	86,952	86,952	0
Passed	40,157	40,157	0
Ignored	19,269	19,269	0
Failed	27,526	27,526	0
Panics	0	0	0
Conformance	46.18%	46.18%	0.00%

VM implementation

Test result	main count	PR count	difference
Total	86,952	86,952	0
Passed	40,847	40,847	0
Ignored	19,269	19,269	0
Failed	26,836	26,836	0
Panics	0	0	0
Conformance	46.98%	46.98%	0.00%

[Razican]

bors r+

[bors]

Pull request successfully merged into main.

Build succeeded:

• Clippy
• Documentation
• Examples
• Rustfmt
• Tests on Linux
• Tests on Linux with vm enabled
• Tests on MacOS
• Tests on Windows