Revert "fixup! CP-50537: Propagate originator as a http request header"

This reverts commit a4648e2.

python3/examples/XenAPI/XenAPI.py

@@ -114,12 +114,18 @@ def with_tracecontext(self):
             # pylint: disable=possibly-used-before-assignment
             propagators = propagate.get_global_textmap()
             propagators.inject(headers, ctx)
-            self._extra_headers = []
+
             for k, v in headers.items():
                 self.add_extra_header(k, v)
     def make_connection(self, host):
+        self._extra_headers = []
         self.with_tracecontext()
 
+        originator_k = "ORIGINATOR"
+        originator_v = os.getenv(originator_k, None)
+        if originator_v:
+            self.add_extra_header(originator_k.lower(), originator_v)
+
         # compatibility with parent xmlrpclib.Transport HTTP/1.1 support
         if self._connection and host == self._connection[0]:
             return self._connection[1]