Remove largely unmaintained Mihawk

A fork of it is maintained but its upstream layer has largely been
unmaintained.
No future products are planned to be based on this layer.
Mihawk is similar to Witherspoon.

Signed-off-by: Myung Bae <myungbae@us.ibm.com>
Change-Id: I82f7d777b78cd126237d51e42f1e11abdf80ae68
diff --git a/meta-ibm/recipes-phosphor/ipmi/phosphor-ipmi-net_%.bbappend b/meta-ibm/recipes-phosphor/ipmi/phosphor-ipmi-net_%.bbappend
index 7883432..7880771 100644
--- a/meta-ibm/recipes-phosphor/ipmi/phosphor-ipmi-net_%.bbappend
+++ b/meta-ibm/recipes-phosphor/ipmi/phosphor-ipmi-net_%.bbappend
@@ -1,8 +1,4 @@
-ALT_RMCPP_IFACE:mihawk = "eth1"
-SYSTEMD_SERVICE:${PN}:append:mihawk = " \
-    ${PN}@${ALT_RMCPP_IFACE}.service \
-    ${PN}@${ALT_RMCPP_IFACE}.socket \
-    "
+
 
 ALT_RMCPP_IFACE:p10bmc = "eth1"
 SYSTEMD_SERVICE:${PN}:append:p10bmc = " \