meta-phosphor: obmc-phosphor-image: rm extrasdev

Don't install packagegroup-obmc-apps-extrasdev by default.  It only
includes a single python script rest-dbus and drags in python on the
target.

To include packagegroup-obmc-apps-extrasdev add a line like:

IMAGE_INSTALL_append = " packagegroup-obmc-apps-extrasdev"

to your local.conf

Change-Id: Iade36565e0bcf42fb2c14aae3c2f30854d09f40a
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/classes/obmc-phosphor-image.bbclass b/classes/obmc-phosphor-image.bbclass
index 807c9c4..5981066 100644
--- a/classes/obmc-phosphor-image.bbclass
+++ b/classes/obmc-phosphor-image.bbclass
@@ -83,7 +83,6 @@
 
 CORE_IMAGE_EXTRA_INSTALL_append = " bash \
         packagegroup-obmc-apps-extras \
-        packagegroup-obmc-apps-extrasdev \
         packagegroup-obmc-apps-extrasdevtools \
         i2c-tools \
         obmc-console \