[PR #9704/26d96107 backport][3.11] Simplify keep-alive logic for HTTP/1.0 in ClientRequest (#9707)

Author: patchback[bot]

aiohttp/client_reqrep.py

@@ -625,10 +625,8 @@ def keep_alive(self) -> bool:
             # keep alive not supported at all
             return False
         if self.version == HttpVersion10:
-            if self.headers.get(hdrs.CONNECTION) == "keep-alive":
-                return True
-            else:  # no headers means we close for Http 1.0
-                return False
+            # no headers means we close for Http 1.0
+            return self.headers.get(hdrs.CONNECTION) == "keep-alive"
         elif self.headers.get(hdrs.CONNECTION) == "close":
             return False