Revert "[HWORKS-1152] Add add_tag method + deprectation warning (logicalclocks#224)" (logicalclocks#225)

This reverts commit 19fd3b7.

Author: vatj

python/hsml/model.py

@@ -15,7 +15,6 @@
 #
 
 import json
-import warnings
 import humps
 from typing import Union, Optional
 
@@ -428,28 +427,6 @@ def set_tag(self, name: str, value: Union[str, dict]):
         A tag consists of a <name,value> pair. Tag names are unique identifiers across the whole cluster.
         The value of a tag can be any valid json - primitives, arrays or json objects.
 
-        !!! warning
-            This method is deprecated and will be remove in 4.0, please use `add_tag` instead.
-
-        # Arguments
-            name: Name of the tag to be added.
-            value: Value of the tag to be added.
-        # Raises
-            `RestAPIError` in case the backend fails to add the tag.
-        """
-        warnings.warn(
-            "Using set_tag is deprecated, please use add_tag instead.",
-            DeprecationWarning,
-            stacklevel=1,
-        )
-        self._model_engine.set_tag(self, name, value)
-
-    def add_tag(self, name: str, value: Union[str, dict]) -> None:
-        """Attach a tag to a model.
-
-        A tag consists of a <name,value> pair. Tag names are unique identifiers across the whole cluster.
-        The value of a tag can be any valid json - primitives, arrays or json objects.
-
         # Arguments
             name: Name of the tag to be added.
             value: Value of the tag to be added.