Tests: proxy.t doesn't need Socket since cdbdb75cf194, drop it.
diff --git a/proxy.t b/proxy.t
index fd661f8..49b5d7a 100644
--- a/proxy.t
+++ b/proxy.t
@@ -11,8 +11,6 @@
 
 use Test::More;
 
-use Socket;
-
 BEGIN { use FindBin; chdir($FindBin::Bin); }
 
 use lib 'lib';