bm_vm3_gc.rb: no shebang

* benchmark/bm_vm3_gc.rb: remove unnecessary shebang line.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51973 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

benchmark/bm_vm3_gc.rb

@@ -1,4 +1,3 @@
-#! /usr/bin/ruby
 5000.times do
   100.times do
     {"xxxx"=>"yyyy"}