Add support for On-The-Fly Dynamic SafeTensors loading.

Reverts cccfc67

PiperOrigin-RevId: 940173584

Author: Google-ML-Automation

src/maxtext/checkpoint_conversion/to_maxtext.py

@@ -67,8 +67,7 @@
 from maxtext.common.common_types import MODEL_MODE_TRAIN
 from maxtext.checkpoint_conversion.utils.hf_model_configs import HF_MODEL_CONFIGS
 from maxtext.checkpoint_conversion.utils.param_mapping import HOOK_FNS, PARAM_MAPPING
-from maxtext.checkpoint_conversion.utils.tensor_handling import apply_hook_fns
-from maxtext.checkpoint_conversion.utils.utils import MemoryMonitorTqdm, load_hf_dict_from_transformers, load_hf_dict_from_safetensors, param_key_parts_from_path, print_peak_memory, print_ram_usage, save_weights_to_checkpoint, validate_and_filter_param_map_keys
+from maxtext.checkpoint_conversion.utils.utils import MemoryMonitorTqdm, apply_hook_fns, load_hf_dict_from_transformers, load_hf_dict_from_safetensors, param_key_parts_from_path, print_peak_memory, print_ram_usage, save_weights_to_checkpoint, validate_and_filter_param_map_keys
 from maxtext.inference.inference_utils import str2bool
 from maxtext.layers import quantizations
 from maxtext.models import models