Fix RuboCop offense in benchmark generator template

Author: Uaitt

railties/lib/rails/generators/rails/benchmark/templates/benchmark.rb.tt

@@ -4,8 +4,6 @@ require_relative "../../config/environment"
 
 # Any benchmarking setup goes here...
 
-
-
 Benchmark.ips do |x|
 <%- reports.each do |report| -%>
   x.report("<%= report %>") { }