refactor: Remove unnecessary number display formatting

calculator/calculator.app.js

@@ -282,9 +282,6 @@ function displayOutput(num) {
       }
     } else {
       displayStr = addSeparators(numStr);
-      if (g.stringWidth(displayStr) > g.getWidth() - 20) {
-        displayStr = numStr;
-      }
     }
     num = displayStr;
 
@@ -295,10 +292,6 @@ function displayOutput(num) {
       }
       num += '...';
     }
-
-    if (num.charAt(0) === '-') {
-      num = '- ' + num.substr(1);
-    }
   }
   g.setFontAlign(1,0);
   g.drawString(num, g.getWidth()-20, RESULT_HEIGHT/2);