Docs: disable sphinx-hoverxref in our docs (#11762)

We are going to start using the new addon link previews.

<!-- readthedocs-preview docs start -->
---
:books: Documentation previews :books:

- User's documentation (`docs`):
https://docs--11762.org.readthedocs.build/en/11762/

<!-- readthedocs-preview docs end -->

<!-- readthedocs-preview dev start -->
- Developer's documentation (`dev`):
https://dev--11762.org.readthedocs.build/en/11762/

<!-- readthedocs-preview dev end -->

docs/conf.py

@@ -18,7 +18,6 @@
 
 sys.path.append(os.path.abspath("_ext"))
 extensions = [
-    "hoverxref.extension",
     "multiproject",
     "myst_parser",
     # For testing, conditionally disable the custom 404 pages on dev docs
@@ -124,14 +123,6 @@
 myst_enable_extensions = [
     "deflist",
 ]
-hoverxref_intersphinx = [
-    "sphinx",
-    "pip",
-    "nbsphinx",
-    "myst-nb",
-    "ipywidgets",
-    "jupytext",
-]
 htmlhelp_basename = "ReadTheDocsdoc"
 latex_documents = [
     (
@@ -181,25 +172,6 @@
     "plausible_domain": f"{os.environ.get('READTHEDOCS_PROJECT')}.readthedocs.io",
 }
 
-hoverxref_auto_ref = True
-hoverxref_domains = ["py"]
-hoverxref_roles = [
-    "option",
-    # Documentation pages
-    # Not supported yet: https://github.com/readthedocs/sphinx-hoverxref/issues/18
-    "doc",
-    # Glossary terms
-    "term",
-]
-hoverxref_role_types = {
-    "mod": "modal",  # for Python Sphinx Domain
-    "doc": "modal",  # for whole docs
-    "class": "tooltip",  # for Python Sphinx Domain
-    "ref": "tooltip",  # for hoverxref_auto_ref config
-    "confval": "tooltip",  # for custom object
-    "term": "tooltip",  # for glossaries
-}
-
 # See dev/style_guide.rst for documentation
 rst_epilog = """
 .. |org_brand| replace:: Read the Docs Community

requirements/docs.in

@@ -11,7 +11,6 @@ sphinx-design
 sphinx-multiproject
 
 # RTD deps :)
-sphinx-hoverxref
 sphinx-notfound-page
 
 # Docs

requirements/docs.txt

@@ -110,7 +110,6 @@ sphinx==8.1.3
     #   sphinx-autobuild
     #   sphinx-copybutton
     #   sphinx-design
-    #   sphinx-hoverxref
     #   sphinx-intl
     #   sphinx-notfound-page
     #   sphinx-prompt
@@ -126,8 +125,6 @@ sphinx-copybutton==0.5.2
     # via -r requirements/docs.in
 sphinx-design==0.6.1
     # via -r requirements/docs.in
-sphinx-hoverxref==1.4.1
-    # via -r requirements/docs.in
 sphinx-intl==2.2.0
     # via -r requirements/docs.in
 sphinx-multiproject==1.0.0
@@ -149,9 +146,7 @@ sphinxcontrib-htmlhelp==2.1.0
 sphinxcontrib-httpdomain==1.8.1
     # via -r requirements/docs.in
 sphinxcontrib-jquery==4.1
-    # via
-    #   sphinx-hoverxref
-    #   sphinx-rtd-theme
+    # via sphinx-rtd-theme
 sphinxcontrib-jsmath==1.0.1
     # via sphinx
 sphinxcontrib-qthelp==2.0.0