Remove old release scripts

[alamb]

Which issue does this PR close?

re #292

Rationale for this change

Remove the release scripts (left over from apache/arrow) in preparation to add rust specific scripts

What changes are included in this PR?

git rm -r dev/release/ dev/tasks/

Are there any user-facing changes?

No

[codecov-commenter]

Codecov Report

Merging #293 (f52763d) into master (3665296) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #293   +/-   ##
=======================================
  Coverage   82.49%   82.49%           
=======================================
  Files         162      162           
  Lines       43980    43980           
=======================================
  Hits        36283    36283           
  Misses       7697     7697           

---

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 3665296...f52763d. Read the comment docs.