Clean MatrixMap class

[sonarcloud[bot]]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[azure-pipelines[bot]]

✔️ 66efba66fd7038157f38fe88a76d17692c5f0a83 -> Azure artifacts URL

[bbpbuildbot]

Logfiles from GitLab pipeline #215072 (:no_entry:) have been uploaded here!

Status and direct links:

• :white_check_mark: mac_m1_cmake_build: [cmake, ON, OFF, OFF, address]
• :white_check_mark: spack_setup
• :white_check_mark: build:nmodl
• :white_check_mark: build:neuron:nmodl:intel:legacy
• :white_check_mark: build:neuron:nmodl:intel:shared
• :white_check_mark: build:neuron:nmodl:nvhpc:acc:legacy
• :white_check_mark: build:neuron:nmodl:nvhpc:acc:shared
• :white_check_mark: build:neuron:nmodl:nvhpc:omp
• :white_check_mark: test:neuron:nmodl:intel:legacy
• :white_check_mark: test:neuron:nmodl:intel:shared
• :white_check_mark: test:neuron:nmodl:nvhpc:acc:legacy
• :white_check_mark: test:neuron:nmodl:nvhpc:acc:shared
• :white_check_mark: test:neuron:nmodl:nvhpc:omp:legacy
• :white_check_mark: test:neuron:nmodl:nvhpc:omp
• :white_check_mark: build:neuron:nmodl:nvhpc:omp:legacy

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 67.22%. Comparing base (25fcd75) to head (66efba6).

Files	Patch %	Lines
src/nrniv/matrixmap.cpp	88.88%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2899 +/- ## ======================================= Coverage 67.22% 67.22% ======================================= Files 569 569 Lines 104709 104693 -16 ======================================= - Hits 70390 70381 -9 + Misses 34319 34312 -7 ```

:umbrella: View full report in Codecov by Sentry.
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