Remove unused code in `internal_random_prime`

core/math/big/prime.odin

@@ -1188,9 +1188,6 @@ internal_random_prime :: proc(a: ^Int, size_in_bits: int, trials: int, flags :=
 	flags  := flags
 	trials := trials
 
-	t := &Int{}
-	defer internal_destroy(t)
-
 	/*
 		Sanity check the input.
 	*/