Remove customizations since they will be available in Volto17 core

[tedw87]

This pr should only be merged after the frontend is upgraded to Volto 17.20

[avoinea]

@dobri1408 I see there are some diff between InternalURLWidget volto 17.20.0 and our deleted version:

3a4,5
>  * Volto pr: https://github.com/plone/volto/pull/6036
>  * Remove after the pr has been merged and put in the right version
6c8
< import React, { useState } from 'react';
---
> import React, { useState, useEffect } from 'react';
18c20
<  * This is a widget used for getting and setting an internal url. You can also use
---
>  * This is the default widget used for the `remoteUrl` field. You can also use
24c26
<  *  widget: 'internal_url',
---
>  *  widget: 'url',
38c40
<     value,
---
>     value: propValue,
41a44
>   const [value, setValue] = useState(flattenToAppURL(propValue));
43a47,51
>   useEffect(() => {
>     if (propValue !== value) {
>       setValue(flattenToAppURL(propValue));
>     }
>   }, [propValue, value]);
48c56
<    * @returns {string} Empty string
---
>    * @returns {undefined}
51c59,60
<     onChange(id, '');
---
>     setValue('');
>     onChange(id, undefined);
65a75,76
>     setValue(newValue);
> 
76c87
<     onChange(id, newValue);
---
>     onChange(id, newValue === '' ? undefined : newValue);
90c101,103
<           onBlur={({ target }) => onBlur(id, target.value)}
---
>           onBlur={({ target }) =>
>             onBlur(id, target.value === '' ? undefined : target.value)
>           }
92,93c105,106
<           minLength={minLength}
<           maxLength={maxLength}
---
>           minLength={minLength || null}
>           maxLength={maxLength || null}

[dobri1408]

The changes were made because the Volto components were updated by the core team during the review process, while our version was the initial one that I developed

[avoinea]

Found the original diff from Volto 17.16.0:

3a4,5
>  * Volto pr: https://github.com/plone/volto/pull/6036
>  * Remove after the pr has been merged and put in the right version
6,7c8
< import React, { useState } from 'react';
< import { compose } from 'redux';
---
> import React, { useState, useEffect } from 'react';
10c11,12
< import { FormFieldWrapper, Icon } from '@plone/volto/components';
---
> import { Icon } from '@plone/volto/components';
> import FormFieldWrapper from '@plone/volto/components/manage/Widgets/FormFieldWrapper';
37a40
>     value: propValue,
41c44
<   const [value, setValue] = useState(flattenToAppURL(props.value));
---
>   const [value, setValue] = useState(flattenToAppURL(propValue));
42a46,51
> 
>   useEffect(() => {
>     if (propValue !== value) {
>       setValue(flattenToAppURL(propValue));
>     }
>   }, [propValue, value]);
180c189
< export default compose(withObjectBrowser)(InternalUrlWidget);
---
> export default withObjectBrowser(InternalUrlWidget);