Remove unused type

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (7ee897e) 99.85% compared to head (979723b) 99.85%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #291 +/- ## ======================================= Coverage 99.85% 99.85% ======================================= Files 907 907 Lines 9474 9474 ======================================= Hits 9460 9460 Misses 14 14 ``` | [Impacted Files](https://app.codecov.io/gh/JuliaSmoothOptimizers/OptimizationProblems.jl/pull/291?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers) | Coverage Δ | | |---|---|---| | [src/PureJuMP/triangle.jl](https://app.codecov.io/gh/JuliaSmoothOptimizers/OptimizationProblems.jl/pull/291?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL1B1cmVKdU1QL3RyaWFuZ2xlLmps) | `100.00% <ø> (ø)` | | | [src/PureJuMP/camshape.jl](https://app.codecov.io/gh/JuliaSmoothOptimizers/OptimizationProblems.jl/pull/291?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL1B1cmVKdU1QL2NhbXNoYXBlLmps) | `100.00% <100.00%> (ø)` | | | [src/PureJuMP/linsv.jl](https://app.codecov.io/gh/JuliaSmoothOptimizers/OptimizationProblems.jl/pull/291?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL1B1cmVKdU1QL2xpbnN2Lmps) | `100.00% <100.00%> (ø)` | | | [src/PureJuMP/mgh01feas.jl](https://app.codecov.io/gh/JuliaSmoothOptimizers/OptimizationProblems.jl/pull/291?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL1B1cmVKdU1QL21naDAxZmVhcy5qbA==) | `100.00% <100.00%> (ø)` | |

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.