Workaround for mysterious CI behavior

Temporary solution to unblock nodegenerator. For some reason
requirements.txt don't get patched properly which results in failure
to rebuild packet with proper dependencies which, in turn,
causes nodegenerator to fail later.

PROD-26064

Change-Id: I3e6b7ad442fec249001ed45e033afa6002125fc6
diff --git a/requirements.txt b/requirements.txt
index 5caff4f..5b3aadd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,3 @@
 pyyaml
 six
 enum34
-ipaddress