API improvements

stbf-pengrad/src/main/java/ru/penkrat/stbf/impl/pengrad/PengradKeyboardBuilder.java

@@ -24,9 +24,7 @@ public class PengradKeyboardBuilder implements KeyboardBuilder {
             return new KeyboardImpl(keyboard, null);
         }
         if (inlineKeyboard != null) {
-            InlineKeyboardButton[][] smallerArray = new InlineKeyboardButton[inlineKeyboard.length - 1][];
-            System.arraycopy(inlineKeyboard, 0, smallerArray, 0, inlineKeyboard.length - 1);
-            return new KeyboardImpl(null, smallerArray);
+            return new KeyboardImpl(null, inlineKeyboard);
         }
         return new NoKeyboard();
     }