maintainer-pgp-guide: minor wording tweaks

Tweak some wording to remove redundant information.
Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220727-docs-pgp-guide-v2-5-e3e6954affb6@linuxfoundation.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/process/maintainer-pgp-guide.rst

@@ -266,9 +266,7 @@ home, such as your bank vault.
     Your printer is probably no longer a simple dumb device connected to
     your parallel port, but since the output is still encrypted with
     your passphrase, printing out even to "cloud-integrated" modern
-    printers should remain a relatively safe operation. One option is to
-    change the passphrase on your master key immediately after you are
-    done with paperkey.
+    printers should remain a relatively safe operation.
 
 Back up your whole GnuPG directory
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