YAGNI: Delete unused MyMPILib code (NEO-2 is only user)

[krystophny]

Summary

Apply YAGNI principle to MyMPILib - NEO-2 is the ONLY downstream user, so all unused code should be deleted.

Immediate Deletion Candidates (No NEO-2 Dependencies)

Examples/ Directory - DELETE ENTIRELY

• Examples/Allocate/main.f90
• Examples/Gather/main.f90

Unused Internal Modules

• Internal/wuMergeChunk_module.f90 - never used by NEO-2
• Internal/matrix_module.f90 - demo/legacy matrix support
• Internal/version.f90 - unused version string

Unused Tools Modules

• Tools/commandline_parser_module.f90 - CLI parsing, unused
• Tools/configFile_parser_module.f90 - config parsing, unused
• Tools/myLog_module.f90 - logging utility, unused
• Tools/mpelog_module.f90 - MPE profiling, unused
• Tools/packableList_module.f90 - packable list, unused

Total: ~900 lines to delete

Keep (Actually Used by NEO-2)

Core Framework

• Generic/scheduler_module.f90 - base scheduler (inherited by neo2scheduler)
• Generic/workunit_module.f90 - base workunit
• Generic/genericWorkunit_module.f90
• Generic/initWorkunit_module.f90
• Internal/wuMergeWorkunit_module.f90
• Specific/mpiprovider_module.f90 - MPI singleton
• Specific/packBuffer_module.f90
• Internal/clientStatus_module.f90
• Internal/wuDataRequester_module.f90
• Internal/packable_module.f90

Used Tools

• Tools/list_module.f90
• Tools/intList_module.f90
• Tools/wuList_module.f90

Internal Machinery (keep for now)

• Dispatcher/Listener headers and bodies (12 files) - embedded in scheduler, would require significant refactoring to remove

Future Refactoring Candidates

The dispatcher/listener framework (~1,600 LOC) is internal scheduler machinery. NEO-2 never directly uses these types but they're wired into the base scheduler. Consider:

1. Simplifying scheduler if NEO-2 doesn't need full load-balancing
2. Extracting as optional features

[krystophny]

Duplicate of #265. MyMPILib move to NEO-2 is tracked there, with PRs #259 and itpplasma/NEO-2#66.