style: merge elicit_url import into single block

Removes the _elicit_url alias — bare elicit_url in the method body
resolves to the module-level import via Python's LEGB scoping, not
the same-named method on the class.

Author: maxisbey

src/mcp/server/mcpserver/context.py

@@ -10,11 +10,9 @@
     ElicitationResult,
     ElicitSchemaModelT,
     UrlElicitationResult,
+    elicit_url,
     elicit_with_validation,
 )
-from mcp.server.elicitation import (
-    elicit_url as _elicit_url,
-)
 from mcp.server.lowlevel.helper_types import ReadResourceContents
 
 if TYPE_CHECKING:
@@ -178,7 +176,7 @@ async def elicit_url(
         Returns:
             UrlElicitationResult indicating accept, decline, or cancel
         """
-        return await _elicit_url(
+        return await elicit_url(
             session=self.request_context.session,
             message=message,
             url=url,