docs: Modified docs conf to changes in RTD.

Signed-off-by: enriquezgarc <enriquezgarcia.external@infineon.com>

docs/conf.py

@@ -127,18 +127,13 @@
 # -- Options for HTML output ----------------------------------------------
 
 # on_rtd is whether we are on readthedocs.org
-on_rtd = os.environ.get("READTHEDOCS", None) == "True"
-
-if not on_rtd:  # only import and set the theme if we're building docs locally
-    try:
-        import sphinx_rtd_theme
-
-        html_theme = "sphinx_rtd_theme"
-        html_theme_path = [sphinx_rtd_theme.get_html_theme_path(), "."]
-    except:
-        html_theme = "default"
-        html_theme_path = ["."]
-else:
+try:
+    import sphinx_rtd_theme
+
+    html_theme = "sphinx_rtd_theme"
+    html_theme_path = [sphinx_rtd_theme.get_html_theme_path(), "."]
+except:
+    html_theme = "default"
     html_theme_path = ["."]
 
 # Theme options are theme-specific and customize the look and feel of a theme

docs/requirements.txt

@@ -2,3 +2,4 @@ sphinx~=7.2.6
 sphinxcontrib.jquery==4.1
 sphinx-tabs
 sphinxemoji==0.1.8
+sphinx-rtd-theme