REF: put DatetimeBlock adjacent to DatetimeLikeBlockMixin

[jbrockmendel]

• closes #xxxx
• tests added / passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• whatsnew entry

[jreback]

just a straight move?

[jbrockmendel]

yep

[jreback]

k ping on green

[codecov]

Codecov Report

Merging #24582 into master will increase coverage by <.01%.
The diff coverage is 94.1%.

@@            Coverage Diff             @@
##           master   #24582      +/-   ##
==========================================
+ Coverage   92.36%   92.36%   +<.01%     
==========================================
  Files         166      166              
  Lines       52494    52494              
==========================================
+ Hits        48485    48486       +1     
+ Misses       4009     4008       -1

Flag	Coverage Δ
#multiple	90.79% <94.1%> (ø)	⬆️
#single	43.04% <43.43%> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/core/internals/blocks.py	93.79% <94.1%> (+0.06%)	⬆️

---

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 4b91140...e66487e. Read the comment docs.

[codecov]

Codecov Report

Merging #24582 into master will increase coverage by <.01%.
The diff coverage is 94.1%.

@@            Coverage Diff             @@
##           master   #24582      +/-   ##
==========================================
+ Coverage   92.36%   92.36%   +<.01%     
==========================================
  Files         166      166              
  Lines       52494    52494              
==========================================
+ Hits        48485    48486       +1     
+ Misses       4009     4008       -1

Flag	Coverage Δ
#multiple	90.79% <94.1%> (ø)	⬆️
#single	43.04% <43.43%> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/core/internals/blocks.py	93.79% <94.1%> (+0.06%)	⬆️

---

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 4b91140...e66487e. Read the comment docs.

[jbrockmendel]

ping