Removed unnecessary 'return' and '()'

lib/common/common_helper.rb

@@ -85,12 +85,12 @@ def last_update
     content = File.read(LAST_UPDATE_FILE)
     date = Time.parse(content) rescue nil
   end
-  return date
+  date
 end
 
 def update_required?
-  date = last_update() or Time.parse('2000-01-01')
-  return date < 5.days.ago
+  date = last_update or Time.parse('2000-01-01')
+  date < 5.days.ago
 end
 
 # Define colors

wpscan.rb

@@ -36,7 +36,7 @@ def main
 
     if wpscan_options.version
       puts "Current version: #{WPSCAN_VERSION}"
-      date = last_update()
+      date = last_update
       puts "Last db update: #{date.strftime('%Y-%m-%d')}" unless date.nil?
       exit(0)
     end