Remove -Y from --help, and example in manual.

doc/wget.texi

@@ -3376,7 +3376,7 @@ List}).
 
 @item
 Try to repeat the bug in as simple circumstances as possible.  E.g. if
-Wget crashes while downloading @samp{wget -rl0 -kKE -t5 -Y0
+Wget crashes while downloading @samp{wget -rl0 -kKE -t5 --no-proxy
 http://yoyodyne.com -o /tmp/log}, you should try to see if the crash is
 repeatable, and if will occur with a simpler set of options.  You might
 even try to start the download at the page where the crash occurred to

src/main.c

@@ -444,8 +444,6 @@ Download:\n"),
        --waitretry=SECONDS       wait 1..SECONDS between retries of a retrieval.\n"),
     N_("\
        --random-wait             wait from 0...2*WAIT secs between retrievals.\n"),
-    N_("\
-  -Y,  --proxy                   explicitly turn on proxy.\n"),
     N_("\
        --no-proxy                explicitly turn off proxy.\n"),
     N_("\