Remove unused imports in tests (GH-14518)

diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py
index 362d093..393cdaf 100644
--- a/Lib/test/test_math.py
+++ b/Lib/test/test_math.py
@@ -12,7 +12,7 @@
 import random
 import struct
 import sys
-import sysconfig
+
 
 eps = 1E-05
 NAN = float('nan')