Revert "Fix typing annotations for FSDP and DeepSpeed in TrainingArguments" (#24574)

Revert "Fix typing annotations for FSDP and DeepSpeed in TrainingArguments (#24549)"

This reverts commit c5e29d43.

src/transformers/training_args.py

@@ -976,12 +976,12 @@ class TrainingArguments:
             )
         },
     )
-    fsdp_config: Optional[Union[str, Dict]] = field(
+    fsdp_config: Optional[str] = field(
         default=None,
         metadata={
             "help": (
-                "Config to be used with FSDP (Pytorch Fully Sharded  Data Parallel). The value is either a"
-                "fsdp json config file (e.g., `fsdp_config.json`) or an already loaded json file as `dict`."
+                "Config to be used with FSDP (Pytorch Fully Sharded  Data Parallel). The  value is either a"
+                "fsdp json config file (e.g., `fsdp_config.json`) or an already loaded  json file as `dict`."
             )
         },
     )
@@ -994,11 +994,11 @@ class TrainingArguments:
             )
         },
     )
-    deepspeed: Optional[Union[str, Dict]] = field(
+    deepspeed: Optional[str] = field(
         default=None,
         metadata={
             "help": (
-                "Enable deepspeed and pass the path to deepspeed json config file (e.g. `ds_config.json`) or an already"
+                "Enable deepspeed and pass the path to deepspeed json config file (e.g. ds_config.json) or an already"
                 " loaded json file as a dict"
             )
         },