Fix a couple broken glossary entries.

_glossary/istio-auth.md

@@ -2,7 +2,5 @@
 title: Istio-Auth
 type: markdown
 ---
-{% include home.html %}
-
 Istio-Auth provides strong service-to-service and end-user authentication using mutual TLS, with built-in identity and
 credential management. Learn more about Istio-Auth [here](../concepts/network-and-auth/auth.html).

_glossary/mixer.md

@@ -2,7 +2,5 @@
 title: Mixer
 type: markdown
 ---
-{% include home.html %}
-
 Mixer is an Istio component responsible for enforcing access control and usage policies across the service mesh and collecting telemetry data
 from the Envoy proxy and other services. Learn more about Mixer [here](../../concepts/policy-and-control/mixer.html).