Removing multiprocessing portion of waterdynamics.hydrogenbondlifetimes

[IAlibay]

Fixes #2511

Changes made in this Pull Request:

• Removes the multiprocessing portion of the Waterdynamics.HydrogenBondLifetimes code.

PR Checklist

• Tests?
• Docs?
• CHANGELOG updated?
• Issue raised/referenced?

[codecov]

Codecov Report

Merging #2520 into develop will increase coverage by 0.1%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           develop    #2520     +/-   ##
==========================================
+ Coverage    90.46%   90.56%   +0.1%     
==========================================
  Files          170      170             
  Lines        22812    23106    +294     
  Branches      2976     2985      +9     
==========================================
+ Hits         20636    20927    +291     
- Misses        1580     1581      +1     
- Partials       596      598      +2

Impacted Files	Coverage Δ
...DAnalysis/analysis/hydrogenbonds/hbond_analysis.py	95.45% <100%> (+0.08%)	⬆️
package/MDAnalysis/coordinates/PDB.py	89.88% <40%> (-0.76%)	⬇️
package/MDAnalysis/analysis/polymer.py	100% <0%> (ø)	⬆️
package/MDAnalysis/coordinates/NAMDBIN.py	100% <0%> (ø)	⬆️
package/MDAnalysis/core/topology.py	100% <0%> (ø)	⬆️
package/MDAnalysis/coordinates/MMTF.py	100% <0%> (ø)	⬆️
package/MDAnalysis/topology/PQRParser.py	98.93% <0%> (+0.01%)	⬆️
package/MDAnalysis/topology/LAMMPSParser.py	95.37% <0%> (+0.01%)	⬆️
package/MDAnalysis/analysis/waterdynamics.py	90.64% <0%> (+0.02%)	⬆️
package/MDAnalysis/coordinates/XDR.py	98.31% <0%> (+0.02%)	⬆️
... and 29 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update dbd836f...b940f2a. Read the comment docs.

[IAlibay]

Seems like the MacOS build is failing somewhere on test_libdcd, this is reproducible across PRs (at least #2518 and #2516 are also failing at the same place).

[orbeckst]

thanks!