Remove duplicate copyright years from the README.

postmodern · postmodern · commit e897f29a8ba9 · 2024-01-25T02:46:21.000-08:00
diff --git a/README.md b/README.md
@@ -129,8 +129,6 @@ $ gem install ruby-nmap
 
 ## License
 
-Copyright (c) 2009-2022 Postmodern
-
 See {file:LICENSE.txt} for license information.
 
 [nmap]: http://www.insecure.org/
