Remove duplicated condition

We're checking the same thing in the previous line

1 files changed, 1 insertions, 1 deletions

diff --git a/bin/with_rubygems b/bin/with_rubygems
index 96299669be..07c7ac1de9 100755
--- a/bin/with_rubygems
+++ b/bin/with_rubygems
@@ -13,7 +13,7 @@ rubygems_path = Pathname.new(version).expand_path
 unless rubygems_path.directory?
   rubygems_path = Pathname.new("tmp/rubygems").expand_path
   unless rubygems_path.directory?
-    rubygems_path.parent.mkpath unless rubygems_path.directory?
+    rubygems_path.parent.mkpath
     run("git", "clone", "https://github.com/rubygems/rubygems.git", rubygems_path.to_s)
   end
   Dir.chdir(rubygems_path) do