Revert "add version switcher"

This reverts commit fd548ce.

Author: SvenKlaassen

doc/_static/switcher.json

@@ -14,8 +14,6 @@
 import sys
 sys.path.insert(0, os.path.abspath('..'))
 
-import doubleml
-
 
 # -- Project information -----------------------------------------------------
 
@@ -71,38 +69,15 @@
 #
 html_theme = 'pydata_sphinx_theme'
 
-# html_logo = '../img/logo.png'
-html_extra_path = ['../img/logo.png']
-html_favicon = '../img/favicon.ico'
-
-# Define the json_url for our version switcher.
-json_url = 'https://docs.doubleml.org/stable/_static/switcher.json'
-
-# Define the version we use for matching in the version switcher.
-version_match = os.environ.get("READTHEDOCS_VERSION")
-# If READTHEDOCS_VERSION doesn't exist, we're not on RTD
-# If it is an integer, we're in a PR build and the version isn't correct.
-if not version_match or version_match.isdigit():
-    # For local development, infer the version to match from the package.
-    release = doubleml.__version__
-    if "dev" in release or "rc" in release:
-        version_match = "latest"
-        # We want to keep the relative reference if we are in dev mode
-        # but we want the whole url if we are effectively in a released version
-        json_url = "_static/switcher.json"
-    else:
-        version_match = "v" + release
-
 html_theme_options = {
-    "navbar_start": ["navbar-logo", "version-switcher"],
     'github_url': 'https://github.com/DoubleML/doubleml-for-py',
     'navigation_with_keys': False,
-    'switcher': {
-        'json_url': json_url,
-        'version_match': version_match,
-    }
 }
 
+# html_logo = '../img/logo.png'
+html_extra_path = ['../img/logo.png']
+html_favicon = '../img/favicon.ico'
+
 html_sidebars = {'**': ['logo.html',
                         'search-field.html',
                         'sidebar-nav-bs.html'],