refactor: drop old flags (#5028)

We are long released all these features and no longer need flags for
them.

Author: TrySound

apps/builder/app/builder/features/command-panel/command-panel.tsx

@@ -2,7 +2,6 @@ import { atom, computed } from "nanostores";
 import { useStore } from "@nanostores/react";
 import { useState } from "react";
 import { matchSorter } from "match-sorter";
-import { isFeatureEnabled } from "@webstudio-is/feature-flags";
 import {
   Command,
   CommandDialog,
@@ -55,9 +54,6 @@ const $commandPanel = atom<
 >();
 
 export const openCommandPanel = () => {
-  if (isFeatureEnabled("command") === false) {
-    return;
-  }
   const activeElement =
     document.activeElement instanceof HTMLElement
       ? document.activeElement

apps/builder/app/builder/features/components/components.tsx

@@ -70,13 +70,6 @@ const $metas = computed(
 
       // only set available components from component meta
       availableComponents.add(name);
-      if (
-        isFeatureEnabled("headSlotComponent") === false &&
-        name === "HeadSlot"
-      ) {
-        continue;
-      }
-
       metas.push({
         name,
         category: componentMeta.category ?? "hidden",

apps/builder/app/builder/features/pages/custom-metadata.tsx

@@ -11,7 +11,6 @@ import {
   theme,
 } from "@webstudio-is/design-system";
 import { TrashIcon, PlusIcon } from "@webstudio-is/icons";
-import { isFeatureEnabled } from "@webstudio-is/feature-flags";
 import { isLiteralExpression } from "@webstudio-is/sdk";
 import { computeExpression } from "~/shared/data-variables";
 import {
@@ -72,20 +71,18 @@ const MetadataItem = (props: {
         Content
       </Label>
       <BindingControl>
-        {isFeatureEnabled("cms") && (
-          <BindingPopover
-            scope={scope}
-            aliases={aliases}
-            variant={isLiteralExpression(props.content) ? "default" : "bound"}
-            value={props.content}
-            onChange={(value) => {
-              props.onChange(props.property, value);
-            }}
-            onRemove={(evaluatedValue) => {
-              props.onChange(props.property, JSON.stringify(evaluatedValue));
-            }}
-          />
-        )}
+        <BindingPopover
+          scope={scope}
+          aliases={aliases}
+          variant={isLiteralExpression(props.content) ? "default" : "bound"}
+          value={props.content}
+          onChange={(value) => {
+            props.onChange(props.property, value);
+          }}
+          onRemove={(evaluatedValue) => {
+            props.onChange(props.property, JSON.stringify(evaluatedValue));
+          }}
+        />
         <InputErrorsTooltip errors={undefined}>
           <InputField
             css={{