Don't ask for storage as an extras in CI

[berland]

Issue
Resolves warning in CI on missing extas in ERT.

This is a followup to 28d777d#diff-60f61ab7a8d1910d86d9fda2261620314edcae5894d5aaa236b821c7256badd7

Approach
rm. ert-storage is an explicit requirement now.

Pre review checklist

• Added appropriate labels

Adding labels helps the maintainers when writing release notes, see sections and the
corresponding labels here: https://github.com/equinor/ert/blob/main/.github/release.yml

[codecov-commenter]

Codecov Report

Merging #2695 (78679ca) into main (1b7390a) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2695   +/-   ##
=======================================
  Coverage   65.06%   65.06%           
=======================================
  Files         651      651           
  Lines       53917    53917           
  Branches     4610     4610           
=======================================
+ Hits        35079    35082    +3     
+ Misses      17360    17357    -3     
  Partials     1478     1478           

Impacted Files	Coverage Δ
libres/lib/res_util/block_fs.cpp	53.38% <0.00%> (ø)
ert_shared/status/tracker/legacy.py	87.83% <0.00%> (+1.58%)	⬆️

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