stest: Drop a redundant test

We were going to use this for key rollover tests etc.  But in fact
we (much later in this series) will introduce new tests for the new
key loading arrangements.  Actual key rollover will come *much* later
and there is little point having this placeholder in the meantime.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/stest/t-dyni-kex b/stest/t-dyni-kex
deleted file mode 100755 (executable)
index 4bc0087..0000000
--- a/stest/t-dyni-kex
+++ /dev/null
@@ -1,7 +0,0 @@
-#! /usr/bin/tclsh
-
-# Dyamic key rollover config on inside only
-
-source stest/common.tcl
-
-test-kex