remove unused regex

Author: joshhunt

backport/backport.go

@@ -4,16 +4,13 @@ import (
 	"context"
 	"fmt"
 	"log/slog"
-	"regexp"
 	"strings"
 	"time"
 
 	"github.com/google/go-github/v50/github"
 	"github.com/grafana/grafana-github-actions-go/pkg/ghutil"
 )
 
-var semverRegex = regexp.MustCompile(`^(?P<major>0|[1-9]\d*)\.(?P<minor>0|[1-9]\d*)\.(?P<patch>x|0|[1-9]\d*)(?:-(?P<prerelease>(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+(?P<buildmetadata>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$`)
-
 type BackportOpts struct {
 	// PullRequestNumber is the integer ID of the pull request being backported
 	PullRequestNumber int