[rubygems/rubygems] Remove annoying debug info

Sometimes you want this, sometimes you don't. And when you don't, this
hides other debugging puts you may have added.

https://github.com/rubygems/rubygems/commit/df37582c81

test/rubygems/test_gem_installer.rb

@@ -1652,19 +1652,6 @@ end
         installer.install
       end
       assert_path_exist so
-    rescue StandardError
-      puts "-" * 78
-      puts File.read File.join(@gemhome, "gems", "a-2", "Makefile")
-      puts "-" * 78
-
-      path = File.join(@gemhome, "gems", "a-2", "gem_make.out")
-
-      if File.exist?(path)
-        puts File.read(path)
-        puts "-" * 78
-      end
-
-      raise
     end
   end