[web] Drop warning shown in storage page

The regular Agama UI's workflow is to keep the system unchanged until
installation begins, so warning users about it is actually not needed.
Thus, we agreed to use these intrusive warnings only in cases when/where
Agama will take immediate action.

web/src/components/storage/ProposalPage.jsx

@@ -20,12 +20,10 @@
  */
 
 import React, { useCallback, useReducer, useEffect } from "react";
-import { Alert } from "@patternfly/react-core";
 
 import { _ } from "~/i18n";
 import { useInstallerClient } from "~/context/installer";
 import { toValidationError, useCancellablePromise } from "~/utils";
-import { Icon } from "~/components/layout";
 import { Page } from "~/components/core";
 import {
   ProposalActionsSection,
@@ -210,11 +208,6 @@ export default function ProposalPage() {
 
     return (
       <>
-        <Alert
-          isInline
-          customIcon={<Icon name="info" size="xxs" />}
-          title={_("Devices will not be modified until installation starts.")}
-        />
         <ProposalSettingsSection
           availableDevices={state.availableDevices}
           volumeTemplates={usefulTemplates()}

web/src/components/storage/ProposalPage.test.jsx

@@ -116,12 +116,6 @@ it("loads the proposal data", async () => {
   await screen.findByText(/\/dev\/vda/);
 });
 
-it("renders a warning about modified devices", async () => {
-  installerRender(<ProposalPage />);
-
-  await screen.findByText(/Devices will not be modified/);
-});
-
 it("renders the settings, find space and actions sections", async () => {
   installerRender(<ProposalPage />);