Remove Stonewither fan and power supply support

This does the following:

* Removes the D-Bus monitor rules for monitoring fan
  and power supply status.

* Removes the fan control features and packages.

* Removes the MSL (Min Ship Level) checking for the
  MAX31785 fan controller that is no longer present.

Resolves openbmc/openbmc#2700

Change-Id: I5c824d68dd21d090a08044ac84d2f275f58c97b5
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/meta-stonewither/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend b/meta-stonewither/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
new file mode 100644
index 0000000..afb8507
--- /dev/null
+++ b/meta-stonewither/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
@@ -0,0 +1 @@
+PACKAGES_remove += "${PN}-fan-control"