Removing reference to vert

vert is not longer using a supported version of this lib.

Closes #244

Signed-off-by: Matt Farina <matt@mattfarina.com>

README.md

@@ -13,9 +13,6 @@ Active](https://masterminds.github.io/stability/active.svg)](https://masterminds
 [![GoDoc](https://img.shields.io/static/v1?label=godoc&message=reference&color=blue)](https://pkg.go.dev/github.com/Masterminds/semver/v3)
 [![Go Report Card](https://goreportcard.com/badge/github.com/Masterminds/semver)](https://goreportcard.com/report/github.com/Masterminds/semver)
 
-If you are looking for a command line tool for version comparisons please see
-[vert](https://github.com/Masterminds/vert) which uses this library.
-
 ## Package Versions
 
 Note, import `github.com/Masterminds/semver/v3` to use the latest version.