Remove unused dependency to `symfony/css-selector`

[osnard]

There is no code relying on this dependency.

This PR is made in reference to: #710

This PR includes:

• [ ] Update of RELEASE-NOTES.md
• [ ] Tests (unit/integration)
• [ ] CI build passed

[codecov-commenter]

Codecov Report

Merging #711 (c1db4ae) into master (cfcd33f) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #711   +/-   ##
=========================================
  Coverage     39.31%   39.31%           
  Complexity     2046     2046           
=========================================
  Files            75       75           
  Lines          7233     7233           
=========================================
  Hits           2844     2844           
  Misses         4389     4389           

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