removing reset of L and U matrices

[K20shores]

Closes #587

All tests pass after removing the reset of the matrices

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.27%. Comparing base (6c635d2) to head (4fc34ca).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 577-test-all-parameter-types-of-the-dense-matrix-cpu-rosenbrock-on-the-analytical-policy-tests #594 +/- ## ================================================================================================================================== - Coverage 93.27% 93.27% -0.01% ================================================================================================================================== Files 49 49 Lines 3466 3464 -2 ================================================================================================================================== - Hits 3233 3231 -2 Misses 233 233 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.