doc: remove duplicate word

PR-URL: #50475
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Vinícius Lourenço Claro Cardoso <[email protected]>
Reviewed-By: Darshan Sen <[email protected]>

Author: Flarna

doc/api/http.md

@@ -4043,7 +4043,6 @@ identified by `code: 'ERR_INVALID_HTTP_TOKEN'`.
 
 It is not necessary to use this method before passing headers to an HTTP request
 or response. The HTTP module will automatically validate such headers.
-Examples:
 
 Example: