Remove unnecessary using

diff --git a/src/transfer_function.cc b/src/transfer_function.cc
index c1343ff2c3eb6b003c58e781f534ed44e6855034..7b17fd363f8035542fddf2e605969e0dcdb88aa3 100644 (file)
--- a/src/transfer_function.cc
+++ b/src/transfer_function.cc
@@ -42,7 +42,6 @@
 
 
 using std::make_pair;
-using std::map;
 using std::pair;
 using std::pow;
 using std::shared_ptr;