no need to pop_back newline after cppipe update

vene.cpp

@@ -296,7 +296,6 @@ extern "C"
 				return;
 
 			string bm_dir = bm_root + dir;
-			bm_dir.pop_back(); // remove trailing newline
 
 			// Choose bookmark
 			string link = $(dmenu < bm_dir.c_str());