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diff --git a/external/unbound/libunbound/python/doc/examples/example2.rst b/external/unbound/libunbound/python/doc/examples/example2.rst
deleted file mode 100644
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--- a/external/unbound/libunbound/python/doc/examples/example2.rst
+++ /dev/null
@@ -1,41 +0,0 @@
-.. _example_setup_ctx:
-
-Lookup from threads
-===================
-
-This example shows how to use unbound module from a threaded program.
-In this example, three lookup threads are created which work in background.
-Each thread resolves different DNS record.
-
-Source code
------------
-
-::
-
-    #!/usr/bin/python
-    from unbound import ub_ctx, RR_TYPE_A, RR_CLASS_IN
-    from threading import Thread
-
-    ctx = ub_ctx()
-    ctx.resolvconf("/etc/resolv.conf")
-
-    class LookupThread(Thread):
-        def __init__(self,ctx, name):
-            Thread.__init__(self)
-            self.ctx = ctx
-            self.name = name
-
-        def run(self):
-            print "Thread lookup started:",self.name
-            status, result = self.ctx.resolve(self.name, RR_TYPE_A, RR_CLASS_IN)
-            if status == 0 and result.havedata:
-                print "  Result:",self.name,":", result.data.address_list
-
-    threads = []
-    for name in ["www.fit.vutbr.cz","www.vutbr.cz","www.google.com"]:
-        thread = LookupThread(ctx, name)
-        thread.start()
-        threads.append(thread)
-
-    for thread in threads:
-        thread.join()