Wprogram.h problem help

hi .

when i try to upload codes to my arduino i have below error but strange problem about it is that
#include <WProgram.h> that error mentions does not exist in my code at all ! and i could find no zip file of that in order to install it .

error :

Arduino: 1.8.3 (Windows 8.1), Board: "Arduino/Genuino Uno"

Build options changed, rebuilding all
In file included from C:\Users\Gharaei.m\Documents\Arduino__.ino:2:0:

C:\Users\Gharaei.m\Documents\Arduino\libraries\SoftwareServo/SoftwareServo.h:4:22: fatal error: WProgram.h: No such file or directory

#include <WProgram.h>

^

compilation terminated.

exit status 1
Error compiling for board Arduino/Genuino Uno.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

You have some very old code, which you haven't shown us.
Try Arduino.h instead.

• Ensure the Arduino IDE is closed

• Locate SoftwareServo.h

• Open SoftwareServo.h in your favorite text editor

• Line #4 should look like this...

• Change line #4 to this...

#include <Arduino.h>

• Save SoftwareServo.h

• Close the text editor

• Try again to build your sketch

• Report the problem here...

problem solved , thank you so much