tests: Remove unnecessary mocks of recent_view_util.

Since is_visible was refactored to use a variable, these mocks
are not required.

Also, since is_visible return `false` by default, mocking it
to return false is not required.

web/tests/compose_actions.test.js

@@ -44,9 +44,6 @@ const narrow_state = mock_esm("../src/narrow_state", {
 mock_esm("../src/reload_state", {
     is_in_progress: () => false,
 });
-mock_esm("../src/recent_view_util", {
-    is_visible: noop,
-});
 mock_esm("../src/drafts", {
     update_draft: noop,
 });

web/tests/compose_closed_ui.test.js

@@ -7,9 +7,6 @@ const {mock_esm, set_global, zrequire} = require("./lib/namespace");
 const {run_test} = require("./lib/test");
 const $ = require("./lib/zjquery");
 
-mock_esm("../src/recent_view_util", {
-    is_visible: () => false,
-});
 const noop = () => {};
 // Mocking and stubbing things
 set_global("document", "document-stub");

web/tests/example7.test.js

@@ -63,7 +63,6 @@ message_lists.home = {view: {}};
 message_lists.all_rendered_message_lists = () => [message_lists.home, message_lists.current];
 
 const message_store = zrequire("message_store");
-const recent_view_util = zrequire("recent_view_util");
 const stream_data = zrequire("stream_data");
 const unread = zrequire("unread");
 const unread_ops = zrequire("unread_ops");
@@ -92,9 +91,6 @@ run_test("unread_ops", ({override}) => {
         },
     ];
 
-    // We don't want Recent Conversations to process message for this test.
-    recent_view_util.set_visible(false);
-
     // Make our test message appear to be unread, so that
     // we then need to subsequently process them as read.
     message_store.update_message_cache(test_messages[0]);

web/tests/narrow_activate.test.js

@@ -34,9 +34,6 @@ const stream_list = mock_esm("../src/stream_list");
 const left_sidebar_navigation_area = mock_esm("../src/left_sidebar_navigation_area");
 const typing_events = mock_esm("../src/typing_events");
 const unread_ops = mock_esm("../src/unread_ops");
-mock_esm("../src/recent_view_util", {
-    is_visible() {},
-});
 mock_esm("../src/pm_list", {
     handle_narrow_activated() {},
 });