Remove unused EOFs

lib/msf/core/exploit/powershell.rb

@@ -77,10 +77,9 @@ module Exploit::Powershell
   # Will invoke PSH modifiers as enabled
   #
   # @param script_in [String] Script contents
-  # @param eof [String] Marker to indicate the end of file appended to script
   #
   # @return [String] Encoded script
-  def encode_script(script_in, eof = nil)
+  def encode_script(script_in)
     # Build script object
     psh = PowershellScript.new(script_in)
     # Invoke enabled modifiers