Merge pull request #6382 from thaJeztah/rm_ParseEnvFile

opts: remove deprecated ParseEnvFile

opts/envfile_deprecated.go

@@ -1,14 +0,0 @@
-package opts
-
-import (
-	"os"
-
-	"github.com/docker/cli/pkg/kvfile"
-)
-
-// ParseEnvFile reads a file with environment variables enumerated by lines
-//
-// Deprecated: use [kvfile.Parse] and pass [os.LookupEnv] to lookup env-vars from the current environment.
-func ParseEnvFile(filename string) ([]string, error) {
-	return kvfile.Parse(filename, os.LookupEnv)
-}