minor #19708 [AssetMapper] Removing orphaned footnote [2] (ThomasLandauer)

This PR was merged into the 6.4 branch.

Discussion
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[AssetMapper] Removing orphaned footnote [2]

Page: https://symfony.com/doc/6.4/frontend.html

Commits
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f651371 [AssetMapper] Removing orphaned footnote [2]

Author: javiereguiluz

frontend.rst

@@ -37,7 +37,7 @@ Supports TypeScript               :ref:`yes <asset-mapper-ts>`        yes
 Removes comments from JavaScript  no                                  yes
 Removes comments from CSS         no                                  no
 Versioned assets                  always                              optional
-Can update 3rd party packages     yes                                 no :ref:`[3] <ux-note-3>`
+Can update 3rd party packages     yes                                 no :ref:`[2] <ux-note-2>`
 ================================  ==================================  ==========
 
 .. _ux-note-1:
@@ -49,11 +49,7 @@ be executed by a browser.
 
 .. _ux-note-2:
 
-**[2]** There are some `PostCSS`_ plugins available to remove comments from CSS files.
-
-.. _ux-note-3:
-
-**[3]** If you use ``npm``, there are update checkers available (e.g. ``npm-check``).
+**[2]** If you use ``npm``, there are update checkers available (e.g. ``npm-check``).
 
 .. _frontend-asset-mapper: