fix duplicated methods

[daviehh]

Checklist

• [x] Appropriate tests were added
• [x] Any code changes were done in a way that does not break public API
• [x] All documentation related to code changes were updated
• [x] The new code follows the contributor guidelines, in particular the SciML Style Guide and COLPRAC.
• [x] Any new documentation only uses public API

Additional context

The commit near https://github.com/SciML/Optimization.jl/commit/bdc46f0568cf49fb3abe3ea27e60b59081b3e8fc added some duplicate methods, causing precompile errors.

WARNING: Method definition requireshessian(NLopt.Algorithm) in module OptimizationNLopt at /Users/david/.julia/packages/OptimizationNLopt/zjxSh/src/OptimizationNLopt.jl:21 overwritten at /Users/david/.julia/packages/OptimizationNLopt/zjxSh/src/OptimizationNLopt.jl:30.
ERROR: Method overwriting is not permitted during Module precompilation. Use `__precompile__(false)` to opt-out of precompilation.

This PR removes the duplicates.

[codecov[bot]]

Codecov Report

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

Project coverage is 0.06%. Comparing base (19da423) to head (f5ae5b0). Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #762 +/- ## ========================================== - Coverage 67.46% 0.06% -67.40% ========================================== Files 22 22 Lines 1632 1580 -52 ========================================== - Hits 1101 1 -1100 - Misses 531 1579 +1048 ```

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