Merit of deleting metadata using destructiveChanges.xml：
①Multiple metadata can be deleted at once。
The way of deleting metadata using destructiveChanges.xml：
①Create a folder on vscode and name it

②Create the following two files in the folder
a.package.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
<version>58.0</version>
</Package>

b.destructiveChanges.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
<types>
<members>「Metadata name to delete」</members>
<name>「Type of metadata to delete、ex：Layout」</name>
</types>
<version>58.0</version>
</Package>

③Run the below command in terminal
sfdx force:mdapi:deploy --deploydir=「⓵'s name」