build-setup: Clean up removed machines

Barreleye, Firestone and Garrison are no longer part of the OpenBMC
tree.

Change-Id: I35e27fef54e8f3230552a31ebf15f5cd016d733d
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/build-setup.sh b/build-setup.sh
index 225ce4e..c9a61dd 100755
--- a/build-setup.sh
+++ b/build-setup.sh
@@ -112,21 +112,12 @@
 
 # Work out what build target we should be running and set BitBake command
 case ${target} in
-  barreleye)
-    BITBAKE_CMD="TEMPLATECONF=meta-rackspace/meta-barreleye/conf source oe-init-build-env"
-    ;;
   palmetto)
     BITBAKE_CMD="TEMPLATECONF=meta-ibm/meta-palmetto/conf source oe-init-build-env"
     ;;
   witherspoon)
     BITBAKE_CMD="TEMPLATECONF=meta-ibm/meta-witherspoon/conf source oe-init-build-env"
     ;;
-  firestone)
-    BITBAKE_CMD="TEMPLATECONF=meta-ibm/meta-firestone/conf source oe-init-build-env"
-    ;;
-  garrison)
-    BITBAKE_CMD="TEMPLATECONF=meta-ibm/meta-garrison/conf source oe-init-build-env"
-    ;;
   evb-ast2500)
     BITBAKE_CMD="TEMPLATECONF=meta-evb/meta-evb-aspeed/meta-evb-ast2500/conf source oe-init-build-env"
     ;;