postfix::sender: Remove fix-sender exec

manifests/postfix/sender.pp

@@ -34,15 +34,4 @@ define base::postfix::sender(
     require => Package['postfix'],
     notify  => Exec["postmap hash:${file}"],
   }
-
-  case $ensure {
-    default: {
-      exec { "fix-sender-${name}":
-        command => "sed -i -e 's/^${name}..*\$/${line}/' ${file}",
-        unless  => "grep '^${line}\$' ${file}",
-        require => File_line["add-sender-${name}"],
-        notify  => Exec["postmap hash:${file}"],
-      }
-    }
-  }
 }