Remove unused includes and use default struct initialization

[andreas-el]

Built on Mac
Built on Bleeding/komodoenv RGS

Pre review checklist

• Read through the code changes carefully after finishing work
• Make sure tests pass locally (after every commit!)
• Prepare changes in small commits for more convenient review (optional)
• PR title captures the intent of the changes, and is fitting for release notes.
• Updated documentation
• Ensured that unit tests are added for all new behavior (See
  Ground Rules),
  and changes to existing code have good test coverage.

Pre merge checklist

• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.

[codecov-commenter]

Codecov Report

Merging #6105 (688451e) into main (bfbd5f3) will decrease coverage by 0.04%.
Report is 3 commits behind head on main.
The diff coverage is 51.35%.

@@            Coverage Diff             @@
##             main    #6105      +/-   ##
==========================================
- Coverage   82.50%   82.46%   -0.04%     
==========================================
  Files         350      350              
  Lines       21486    21435      -51     
  Branches      826      834       +8     
==========================================
- Hits        17726    17677      -49     
+ Misses       3466     3461       -5     
- Partials      294      297       +3     

Files Changed	Coverage Δ
src/clib/lib/enkf/enkf_obs.cpp	0.00% <ø> (ø)
src/clib/lib/job_queue/job_node.cpp	14.55% <ø> (ø)
src/clib/lib/job_queue/local_driver.cpp	19.60% <ø> (ø)
src/clib/lib/job_queue/slurm_driver.cpp	63.30% <ø> (ø)
src/clib/lib/job_queue/torque_driver.cpp	53.38% <45.45%> (-2.49%)	⬇️
src/clib/lib/job_queue/lsf_driver.cpp	35.77% <100.00%> (-2.31%)	⬇️
src/clib/lib/job_queue/queue_driver.cpp	94.87% <100.00%> (-0.59%)	⬇️

... and 3 files with indirect coverage changes

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[eivindjahren]

So what happens with the empty string case now?

[andreas-el]

It's default initialized to empty string?

e.g.

std::string str{}; // Initializes str to an empty string

[eivindjahren]

Ah, now I get it

[eivindjahren]

Looks good! But I had a few concerns.