Remove unused test dependencies: MonteCarloMeasurements and BenchmarkTools

[ChrisRackauckas-Claude]

Summary

• Removes two completely unused test dependencies: MonteCarloMeasurements and BenchmarkTools
• Reduces test dependency footprint without affecting any functionality

Analysis Performed

Conducted comprehensive analysis of all test files in the repository to identify unused dependencies:

Dependencies Removed:

1. BenchmarkTools - No usage found anywhere in tests

   • No @benchmark, @btime, or BenchmarkTools imports in any test files
   • Removed from both [extras] and test targets

2. MonteCarloMeasurements - No usage found in tests

   • Remains as weak dependency for the extension DiffEqBaseMonteCarloMeasurementsExt
   • Removed only from [extras] and test targets (not from [weakdeps])

Dependencies That Remain:

All other test dependencies are actively used across multiple test files:

• Aqua: Used in aqua.jl
• ForwardDiff: Used in 10+ test files for AD testing
• StaticArrays: Used in 5+ test files
• Distributions: Used in high_level_solve.jl
• LabelledArrays: Used in downstream/labelledarrays.jl
• Measurements: Used in downstream/unwrapping.jl
• Distributed: Used in downstream/distributed_ensemble.jl
• And many others...

Test Plan

• Verified package builds successfully after dependency removal
• Confirmed no imports or usage of removed packages in any test files
• Ensured MonteCarloMeasurements extension remains available as weak dependency

Impact

• Zero functional impact: Removed packages were never used in tests
• Reduced dependency footprint: Two fewer packages to install for testing
• Cleaner Project.toml: Removes unused entries that could cause confusion

🤖 Generated with Claude Code