Reset source code to master again

src/vga_buffer.rs

@@ -135,15 +135,3 @@ struct ScreenChar {
 struct Buffer {
     chars: [[ScreenChar; BUFFER_WIDTH]; BUFFER_HEIGHT],
 }
-
-pub unsafe fn print_error(fmt: fmt::Arguments) {
-    use core::fmt::Write;
-
-    let mut writer = Writer {
-        column_position: 0,
-        color_code: ColorCode::new(Color::Red, Color::Black),
-        buffer: Unique::new(0xb8000 as *mut _),
-    };
-    writer.new_line();
-    writer.write_fmt(fmt);
-}