fixed: all ready for input-testing

src/display.cc

@@ -1,21 +1,4 @@
 #include "display.h"
 
-display::display(): contents{DISPLAY_HEIGHT} {}
-
-void display::clear() {
-        for (auto line : contents)
-                line.clear();
-}
-
-void display::print(std::ostream &out) const {
-        for (auto line : contents)
-                out << line;
-}
-
-void display::print_line(const std::string &line, const int linenum) {
-        contents[linenum] = line;
-}
-
-void display::print_position(const position &pos, const char ch) {
-        contents[pos.y][pos.x] = ch;
-}
+display::display():
+        contents{DISPLAY_BUFFER_SIZE, 0} {}