doc: fix HTTP req/res 'close' description

PR-URL: nodejs#21047
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: ronag

doc/api/http.md

@@ -1019,8 +1019,7 @@ interface. This is an [`EventEmitter`][] with the following events:
 added: v0.6.7
 -->
 
-Indicates that the underlying connection was terminated before
-[`response.end()`][] was called or able to flush.
+Indicates that the underlying connection was terminated.
 
 ### Event: 'finish'
 <!-- YAML
@@ -1512,7 +1511,6 @@ added: v0.4.2
 -->
 
 Indicates that the underlying connection was closed.
-Just like `'end'`, this event occurs only once per response.
 
 ### message.aborted
 <!-- YAML