Move methods of `Kernel` to `kernel.rb` from `io.rb` in `mruby-io` gem

mrbgems/mruby-io/mrblib/io.rb

@@ -372,25 +372,3 @@ STDERR = IO.open(2, "w")
 $stdin  = STDIN
 $stdout = STDOUT
 $stderr = STDERR
-
-module Kernel
-  def print(*args)
-    $stdout.print(*args)
-  end
-
-  def puts(*args)
-    $stdout.puts(*args)
-  end
-
-  def printf(*args)
-    $stdout.printf(*args)
-  end
-
-  def gets(*args)
-    $stdin.gets(*args)
-  end
-
-  def getc(*args)
-    $stdin.getc(*args)
-  end
-end

mrbgems/mruby-io/mrblib/kernel.rb

@@ -12,4 +12,24 @@ module Kernel
       File.open(file, *rest, &block)
     end
   end
+
+  def print(*args)
+    $stdout.print(*args)
+  end
+
+  def puts(*args)
+    $stdout.puts(*args)
+  end
+
+  def printf(*args)
+    $stdout.printf(*args)
+  end
+
+  def gets(*args)
+    $stdin.gets(*args)
+  end
+
+  def getc(*args)
+    $stdin.getc(*args)
+  end
 end