Updated last return in is_factorial

Author: ewd00010

math/check_factorial.cpp

@@ -44,11 +44,7 @@ bool is_factorial(uint64_t n) {
      * if n was the sum of a factorial then it should be divided until it
      * becomes 1
      */
-    if (n == 1) {
-        return true;
-    } else {
-        return false;
-    }
+    return (n == 1)
 }
 }  // namespace math