[PD] Fix sep24-reference-ui-config is missing error (#1632)

### Description

The env var has moved to value file, this sep24-reference-ui-config is
no longer needed

### Context

- Some changes were override in last PR

### Testing

- new ui container started successfully on local

helm-charts/sep24-reference-ui/templates/deployment.yaml

@@ -33,22 +33,11 @@ spec:
               protocol: TCP
           env:
             - name: BUSINESS_SERVER_ENDPOINT
-              valueFrom:
-                configMapKeyRef:
-                  name: sep24-reference-ui-config
-                  key: BUSINESS_SERVER_ENDPOINT
+              value: {{ .Values.config.businessServerEndpoint }}
           resources:
             requests:
               memory: {{ .Values.services.ui.deployment.resources.requests.memory }}
               cpu: {{ .Values.services.ui.deployment.resources.requests.cpu }}
             limits:
               memory: {{ .Values.services.ui.deployment.resources.limits.memory }}
-              cpu: {{ .Values.services.ui.deployment.resources.limits.cpu }}
-          volumeMounts:
-            - name: config-volume
-              mountPath: /config
-              readOnly: true
-      volumes:
-        - name: config-volume
-          configMap:
-            name: sep24-reference-ui-config
+              cpu: {{ .Values.services.ui.deployment.resources.limits.cpu }}