chore(nix): remove unnecessary LD_LIBRARY_PATH #1409

Job	Run time
changed_paths	4s
clippy	2m 59s
cargo check (host)	3m 31s
docs	4m 21s
rustfmt	15s
cargo test (host)	4m 44s
Loom tests (cordyceps)	1m 26s
cargo test (cross x64)	4m 35s
build boot image (x86_64)	3m 11s
Miri tests (cordyceps)	2m 3s
Loom tests (maitake)	4m 12s
Miri tests (maitake)	18m 23s
Tests (maitake, no-default-features)	1m 44s
all_systems_go	1s
	51m 29s

Provide feedback