Clean up kapp-deploy and kapp-delete in line with shellcheck

scripts/kapp-delete

@@ -1,7 +1,5 @@
 #!/usr/bin/env bash
 
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
 set -euo pipefail
 
 NAMESPACE="${NAMESPACE:-"projects-operator"}"

scripts/kapp-deploy

@@ -41,19 +41,19 @@ if [[ $# -eq 1 && "$1" =~ "--local" ]]; then
   LOCAL_YTT_FLAGS="-f ${DIR}/../build/kbld.yaml"
 fi
 
-ytt -f $DIR/../deployments/k8s $LOCAL_YTT_FLAGS \
-  -v name=$NAME \
-  -v instance=$INSTANCE \
-  -v namespace=$NAMESPACE \
-  -v version=$VERSION \
-  -v registry.hostname=$REGISTRY_HOSTNAME \
-  -v registry.project=$REGISTRY_PROJECT \
-  -v registry.username=$REGISTRY_USERNAME \
+ytt -f "$DIR"/../deployments/k8s $LOCAL_YTT_FLAGS \
+  -v name="$NAME" \
+  -v instance="$INSTANCE" \
+  -v namespace="$NAMESPACE" \
+  -v version="$VERSION" \
+  -v registry.hostname="$REGISTRY_HOSTNAME" \
+  -v registry.project="$REGISTRY_PROJECT" \
+  -v registry.username="$REGISTRY_USERNAME" \
   -v registry.password="$REGISTRY_PASSWORD" \
-  -v registry.secretName=$REGISTRY_SECRET_NAME \
-  -v clusterRoleRef=$CLUSTER_ROLE_REF \
+  -v registry.secretName="$REGISTRY_SECRET_NAME" \
+  -v clusterRoleRef="$CLUSTER_ROLE_REF" \
   --data-value-file tls.cert=/tmp/webhook-server-tls.crt \
   --data-value-file tls.key=/tmp/webhook-server-tls.key \
   --data-value-file caCert=/tmp/ca.pem  | \
 kbld $LOCAL_KBLD_FLAGS -f - | \
-kapp deploy -y -a projects-operator -n $NAMESPACE -f -
+kapp deploy -y -a projects-operator -n "$NAMESPACE" -f -