Spurious type parameter <P> on YearMonthField constructor

[javier-godoy]

Describe the bug

The YearMonthField no-arg constructor is declared with an unused generic type parameter:

public <P> YearMonthField() {

<P> is never referenced in the constructor body or signature. This appears to be a copy-paste artefact.

Expected behavior

Constructor is declared without the spurious type parameter:

public YearMonthField() {

Add-on Version

4.6.1-SNAPSHOT

Vaadin Version

N/A