meta-ibm:witherspoon: remove obmc-ikvm package

Witherspoon is running tight on space, and as our primary hardware CI
machine, we need to keep it going.

The GUI has already been pulled out so the KVM package doesn't make much
sense anyway.

Tested:
- Reduced image size by ~200KB
- Will rely on CI to regression test

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I3e55702da764e4e1ca1673e158c7acf4f74c9bda
diff --git a/meta-ibm/conf/machine/witherspoon.conf b/meta-ibm/conf/machine/witherspoon.conf
index 42844c1..e719922 100644
--- a/meta-ibm/conf/machine/witherspoon.conf
+++ b/meta-ibm/conf/machine/witherspoon.conf
@@ -32,3 +32,5 @@
 # Inhibit phosphor-fan-control-fan-config-mrw-native
 PREFERRED_PROVIDER_virtual/phosphor-fan-control-fan-config:df-mrw = \
     "phosphor-fan-control-fan-config"
+
+IMAGE_FEATURES:remove = "obmc-ikvm"