lgtm fixes (#1032)

jpg-130 · poyea · commit 4658f4a49e2b · 2019-07-18T18:47:15.000+08:00
* adding sum of subsets

* lgtm fixes
diff --git a/project_euler/problem_07/sol2.py b/project_euler/problem_07/sol2.py
@@ -7,7 +7,6 @@
 We can see that the 6th prime is 13. What is the Nth prime number?
 """
 from __future__ import print_function
-from math import sqrt
 
 try:
     raw_input  # Python 2
