Re-enable no-std support for safetensorsstore

[antimora]

Description

Re-enable no-std support for safetensorsstore once safetensors publishes a fix for their feature flag issue.

Background

In PR #3902, we temporarily disabled no-std support for safetensorsstore because of an upstream issue in the safetensors crate. The safetensors library made their feature flags mutually exclusive instead of additive, which breaks no-std compatibility.

Upstream Issue

The issue is tracked here: huggingface/safetensors#650

Once this issue is resolved and a new version of safetensors is published, we should:

Tasks

• Monitor Cannot automatically select between std and alloc based on default features huggingface/safetensors#650 for resolution
• Update safetensors dependency to the fixed version
• Re-enable no-std support in burn-store's Cargo.toml
• Re-enable burn-no-std-tests
• Verify all no-std tests pass
• Revert changes from PR Disable no-std safetensorsstore #3902

Related

• PR Disable no-std safetensorsstore #3902
• Cannot automatically select between std and alloc based on default features huggingface/safetensors#650