Remove SparseArrays hard dep

[ChrisRackauckas]

No description provided.

[ChrisRackauckas]

@oscardssmith do you know what's going on here?

[oscardssmith]

no idea. That's very odd. The syntax looks correct to me...

[efaulhaber]

Could this be related to our CI failures on Windows and macOS with Julia 1.10?

      Testing TrixiParticles
      Status `/private/var/folders/2s/h6hvv9ps03xgz_krkkstvq_r0000gn/T/jl_lQhyGj/Project.toml`
  [336ed68f] CSV v0.10.15
  [13f3f980] CairoMakie v0.13.1
  [a93c6f00] DataFrames v1.7.0
  [38e38edf] GLM v1.9.0
  [c27321d9] Glob v1.3.1
  [682c06a0] JSON v0.21.4
  [1dea7af3] OrdinaryDiffEq v6.91.0
  [91a5bcdd] Plots v1.40.9
  [f517fe37] Polyester v0.7.16
  [1fd47b50] QuadGK v2.11.2
  [66699cd8] TrixiParticles v0.2.7-dev `~/work/TrixiParticles.jl/TrixiParticles.jl`
  [37e2e46d] LinearAlgebra
  [de0858da] Printf
  [9a3f8284] Random
  [8dfed614] Test
      Status `/private/var/folders/2s/h6hvv9ps03xgz_krkkstvq_r0000gn/T/jl_lQhyGj/Manifest.toml`
ERROR: LoadError: KeyError: key "SparseArrays" not found

CC @svchb

[devmotion]

Could this be related to our CI failures on Windows and macOS with Julia 1.10?

Maybe that's an instance of JuliaLang/Pkg.jl#4018

[efaulhaber]

There is nothing ]devd. This is a clean environment in CI. Here is a run that failed:
https://github.com/trixi-framework/TrixiParticles.jl/actions/runs/13334236066/job/37326563116?pr=584

[devmotion]

There is nothing ]devd

TrixiParticles is devd in the CI run. Maybe that's sufficient to trigger the bug, maybe not. Another possibly related issue is JuliaLang/Pkg.jl#3947.

[ChrisRackauckas]

Could this be related to our CI failures on Windows and macOS with Julia 1.10?

Well this is just on the PR branch, and this branch isn't merged, so it shouldn't cause anything downstream.

[svchb]

Erik is referring to a common bug, for example, in Pkg.jl.

[devmotion]

Possibly the problem with this PR is that it does not add SparseArrays as additional trigger to the extensions that depend on it. With these additional changes, the Pkg error does not show up anymore: #584