do not use deprecated package

Signed-off-by: Tim van Katwijk <timvankatwijk@hotmail.com>

Author: tim-vk

.packit.yaml

@@ -21,4 +21,3 @@ jobs:
 srpm_build_deps:
   - python3-pip
   - python3-setuptools_scm
-  - Deprecated

dockerfile_parse/parser.py

@@ -11,7 +11,6 @@
 import logging
 import os
 import re
-from deprecated import deprecated
 from contextlib import contextmanager
 from shlex import quote
 
@@ -862,12 +861,12 @@ def context_structure(self):
         return instructions
 
 
-@deprecated(reason="Use image_name_from instead.")
 def image_from(from_value):
     """
     :param from_value: string like "image:tag" or "image:tag AS name"
     :return: tuple of the image and stage name, e.g. ("image:tag", None)
     """
+    DeprecationWarning("Use image_name_from instead.")
     image, name = image_name_from(from_value)
     return str(image) if image else None, name
 

tests/requirements.txt

@@ -1,5 +1,4 @@
 pytest>=4.1.0
 pytest-cov
 pytest-html
-flake8
-Deprecated
+flake8