[web] Drop space-policy-utils.jsx file

No longer needed with the new approach in which the space policy
selection has its own section.

web/src/components/storage/index.js

@@ -32,5 +32,4 @@ export { default as ZFCPPage } from "./ZFCPPage";
 export { default as ZFCPDiskForm } from "./ZFCPDiskForm";
 export { default as ISCSIPage } from "./ISCSIPage";
 export { DeviceList, DeviceSelector } from "./device-utils";
-export { SpacePolicyButton, SpacePolicySelector, SpacePolicyDisksHint } from "./space-policy-utils";
 export { default as VolumeForm } from "./VolumeForm";