Remove unused container registry tag name validation

lib/container_registry/tag.rb

@@ -6,9 +6,6 @@ module ContainerRegistry
 
     attr_reader :repository, :name
 
-    # https://github.com/docker/distribution/commit/3150937b9f2b1b5b096b2634d0e7c44d4a0f89fb
-    TAG_NAME_REGEX = /^[\w][\w.-]{0,127}$/.freeze
-
     delegate :registry, :client, to: :repository
     delegate :revision, :short_revision, to: :config_blob, allow_nil: true
 
@@ -16,10 +13,6 @@ module ContainerRegistry
       @repository, @name = repository, name
     end
 
-    def valid_name?
-      !name.match(TAG_NAME_REGEX).nil?
-    end
-
     def valid?
       manifest.present?
     end