fixing ci again

Author: Rishabh Bafna

maths/series/catalan_numbers.py

@@ -9,8 +9,6 @@
 """
 
 from __future__ import annotations
-import math
-
 
 def catalan_numbers(count: int) -> list[int]:
     """
@@ -64,10 +62,9 @@ def catalan_numbers(count: int) -> list[int]:
 
 
 if __name__ == "__main__":
+    import math
     import doctest
-
     doctest.testmod()
-
     try:
         num = int(input("Enter the number of Catalan numbers to generate: "))
         if num < 0: