Revert fragments commited by mistake

Author: m-aciek

build_docs.py

@@ -790,15 +790,14 @@ def build(self):
         sphinxbuild = self.venv / "bin" / "sphinx-build"
         blurb = self.venv / "bin" / "blurb"
         # Disable cpython switchers, we handle them now:
-        if self.version.as_tuple() <= (3, 7):
-            run(
-                [
-                    "sed",
-                    "-i",
-                    "s/ *-A switchers=1//",
-                    f"'{self.checkout / 'Doc' / 'Makefile'}'",
-                ]
-            )
+        run(
+            [
+                "sed",
+                "-i",
+                "s/ *-A switchers=1//",
+                f"'{self.checkout / 'Doc' / 'Makefile'}'",
+            ]
+        )
         self.version.setup_indexsidebar(
             self.checkout / "Doc" / "tools" / "templates" / "indexsidebar.html"
         )
@@ -1059,8 +1058,6 @@ def main() -> bool:
     languages_dict = {language.tag: language for language in LANGUAGES}
     versions = Version.filter(VERSIONS, args.branch)
     languages = [languages_dict[tag] for tag in args.languages]
-    if not versions:
-        raise ValueError(f"Branch/version {args.branch} not found")
     del args.languages
     del args.branch
     todo = list(product(versions, languages))