core: Use const initializers instead of once_cell
#3314
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jplatte
reviewed
Jun 14, 2025
jplatte
approved these changes
Jun 14, 2025
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Removes the dependency on
once_cellby using const initializers for Mutex and Vec.Also deletes the re-implementation of Lazy for no-std, which is no longer needed.
This is all available in Rust 1.65, so there is no need to raise the MSRV of
tracing-core.