Revert "Merge pull request 101888 from kolyshkin/update-runc-rc94"

This reverts commit b1b06fe0a4, reversing
changes made to 382a33986b.

vendor/github.com/opencontainers/runc/libcontainer/configs/validate/rootless.go

@@ -11,9 +11,6 @@ import (
 // rootlessEUID makes sure that the config can be applied when runc
 // is being executed as a non-root user (euid != 0) in the current user namespace.
 func (v *ConfigValidator) rootlessEUID(config *configs.Config) error {
-	if !config.RootlessEUID {
-		return nil
-	}
 	if err := rootlessEUIDMappings(config); err != nil {
 		return err
 	}