Merge pull request #4752 from shuujii/drop-initialization-dependency-from-mruby-print-to-mruby-sprintf

Drop initialization dependency from `mruby-print` to `mruby-sprintf`

mrbgems/mruby-print/mrblib/print.rb

@@ -48,14 +48,8 @@ module Kernel
     args.__svalue
   end
 
-  unless Kernel.respond_to?(:sprintf)
-    def printf(*args)
-      raise NotImplementedError.new('printf not available')
-    end
-  else
-    def printf(*args)
-      __printstr__(sprintf(*args))
-      nil
-    end
+  def printf(*args)
+    __printstr__(sprintf(*args))
+    nil
   end
 end