Update app.py

Author: tommygonzaleza

exercises/11-Swap_digits/app.py

@@ -1,14 +1,7 @@
 #Complete the fuction to return the swapped digits of a given two-digit-interger.
 def swap_digits(num):
   # Your code here
-  num = str(num)
-  s = ""
-  first_value = num[0]
-  second_value = num[1]
-  s+=second_value
-  s+=first_value
-  return s
 
 
 #Invoke the function with any two digit interger as its argument
-print(swap_digits(30))
+print(swap_digits(30))