storage: remove unnecessary vmm related crates

[imeoer]

To keep the storage crate tidy.

Overview

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Related Issues

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Change Details

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Test Results

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Change Type

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• Bug Fix
• Feature Addition
• Documentation Update
• Code Refactoring
• Performance Improvement
• Other (please describe)

Self-Checklist

Before submitting a pull request, please ensure you have completed the following:

• I have run a code style check and addressed any warnings/errors.
• I have added appropriate comments to my code (if applicable).
• I have updated the documentation (if applicable).
• I have written appropriate unit tests.

[codecov]

Codecov Report

❌ Patch coverage is 34.48276% with 57 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.87%. Comparing base (6c11431) to head (0e5721e).

Files with missing lines	Patch %	Lines
rafs/src/fs.rs	0.00%	46 Missing ⚠️
storage/src/volatile.rs	65.00%	7 Missing ⚠️
storage/src/device.rs	0.00%	3 Missing ⚠️
storage/src/utils.rs	90.90%	0 Missing and 1 partial ⚠️

❌ Your patch check has failed because the patch coverage (34.48%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1944      +/-   ##
==========================================
+ Coverage   67.71%   71.87%   +4.15%     
==========================================
  Files         208      209       +1     
  Lines       60352    60418      +66     
  Branches    53132    53198      +66     
==========================================
+ Hits        40866    43423    +2557     
+ Misses      17753    15007    -2746     
- Partials     1733     1988     +255     

Files with missing lines	Coverage Δ
rafs/src/prefetch.rs	69.38% <ø> (ø)
storage/src/backend/localdisk.rs	49.80% <ø> (ø)
storage/src/backend/localfs.rs	88.44% <ø> (ø)
storage/src/backend/mod.rs	85.58% <ø> (ø)
storage/src/cache/cachedfile.rs	44.64% <ø> (-0.07%)	⬇️
storage/src/cache/dedup/db.rs	78.07% <ø> (ø)
storage/src/cache/dedup/mod.rs	89.54% <ø> (ø)
storage/src/cache/dummycache.rs	93.83% <ø> (ø)
storage/src/cache/filecache/mod.rs	69.90% <100.00%> (ø)
storage/src/cache/mod.rs	57.96% <ø> (ø)
... and 12 more

... and 31 files with indirect coverage changes

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