Don't clone dib-utils in install_heat

It's not used, and a recent change to trim down projects lists in
devstack-gate broke devstack in the gate that enabled heat.

Change-Id: I405423bdc9ba8dd9b30fce6fdceacccf662d5da3
diff --git a/lib/heat b/lib/heat
index c841e0a..0863128 100644
--- a/lib/heat
+++ b/lib/heat
@@ -40,7 +40,6 @@
 HEAT_CFNTOOLS_DIR=$DEST/heat-cfntools
 HEAT_TEMPLATES_REPO_DIR=$DEST/heat-templates
 OCC_DIR=$DEST/os-collect-config
-DIB_UTILS_DIR=$DEST/dib-utils
 ORC_DIR=$DEST/os-refresh-config
 OAC_DIR=$DEST/os-apply-config
 
@@ -276,7 +275,6 @@
     git_clone $OAC_REPO $OAC_DIR $OAC_BRANCH
     git_clone $OCC_REPO $OCC_DIR $OCC_BRANCH
     git_clone $ORC_REPO $ORC_DIR $ORC_BRANCH
-    git_clone $DIB_UTILS_REPO $DIB_UTILS_DIR $DIB_UTILS_BRANCH
 }
 
 # start_heat() - Start running processes, including screen
@@ -420,7 +418,7 @@
 
 # build_heat_pip_mirror() - Build a pip mirror containing heat agent projects
 function build_heat_pip_mirror {
-    local project_dirs="$OCC_DIR $OAC_DIR $ORC_DIR $HEAT_CFNTOOLS_DIR $DIB_UTILS_DIR"
+    local project_dirs="$OCC_DIR $OAC_DIR $ORC_DIR $HEAT_CFNTOOLS_DIR"
     local projpath proj package
 
     rm -rf $HEAT_PIP_REPO