Avoid importing React

Author: wojtekmaj

src/diagramElements/Section.tsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import { Children, cloneElement } from 'react';
 import clsx from 'clsx';
 import T from '@wojtekmaj/react-t';
 
@@ -25,8 +25,8 @@ export default function Section(props: SectionProps) {
   function renderChildren() {
     // If we're creating a section containing subsections, we don't need to create one.
     if (children.find((el) => el.type === Subsection)) {
-      return React.Children.map(children, (child) =>
-        React.cloneElement(child, Object.assign({ sectionCol: col }, props, child.props)),
+      return Children.map(children, (child) =>
+        cloneElement(child, Object.assign({ sectionCol: col }, props, child.props)),
       );
     }
 

src/diagramElements/Subsection.tsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import { Children, cloneElement } from 'react';
 
 import { methods } from './Section.module.css';
 
@@ -65,8 +65,8 @@ type SubsectionProps = {
 };
 
 export default function Subsection({ children, col, colspan, sectionCol }: SubsectionProps) {
-  const mappedChildren = React.Children.map(children, (child) =>
-    React.cloneElement(
+  const mappedChildren = Children.map(children, (child) =>
+    cloneElement(
       child,
       Object.assign(
         { col },