Lint errors: Obsolete HTML tags

Page title	Obsolete HTML tag	Through a template?
Dovedale Wiki (view source \| history)	`center`	Template:Main page/header
User:Stackd/MP (view source \| history)	`center`	—
Dovedale Wiki:Rules (view source \| history)	`center`	Template:PolicyNavigation
Dovedale Wiki:Staff (view source \| history)	`center`	Template:PolicyNavigation
Dovedale Wiki:Staff (view source \| history)	`center`	—
Dovedale Wiki:Staff (view source \| history)	`center`	—
Dovedale Wiki (view source \| history)	`center`	Template:DYKBox
Dovedale Wiki (view source \| history)	`center`	Output not from a single template
User:Stackd/MP (view source \| history)	`center`	Template:DYKBox
User:Stackd/MP (view source \| history)	`center`	Output not from a single template
Template:DYKBox (view source \| history)	`center`	—
Template:Time ago (view source \| history)	`tt`	Output not from a single template
Dovedale Wiki:Style Guide (view source \| history)	`center`	Template:PolicyNavigation
Dovedale Wiki:SMW Guide (view source \| history)	`center`	Template:PolicyNavigation
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Template:Time ago/doc (view source \| history)	`tt`	—
Signalling Guide (view source \| history)	`center`	—
Fanory Mill Sidings (view source \| history)	`center`	—
User:Andrew1234y/Sandbox (view source \| history)	`center`	—