chore: remove mixer config as its deprecation (#1811)
chore: remove mixer config as its deprecation (#1811)

Signed-off-by: Xunzhuo <819e2cd5da9a119bd7fedc192f3a49236d7f9564@gmail.com>
istio/tools,istio/tools,istio/tools,istio/tools,istio/tools,istio/tools