Moving transformers package import statements to relative imports in some files (#5796)

* Moving rom transformers statements to relative imports in some files under src/

* Import order

Co-authored-by: Lysandre Debut <lysandre@huggingface.co>

src/transformers/modeling_mobilebert.py

@@ -32,8 +32,6 @@ import torch.nn.functional as F
 from torch import nn
 from torch.nn import CrossEntropyLoss, MSELoss
 
-from transformers.modeling_bert import BertIntermediate
-
 from .activations import gelu, gelu_new, swish
 from .configuration_mobilebert import MobileBertConfig
 from .file_utils import (
@@ -43,6 +41,7 @@ from .file_utils import (
     add_start_docstrings_to_callable,
     replace_return_docstrings,
 )
+from .modeling_bert import BertIntermediate
 from .modeling_outputs import (
     BaseModelOutput,
     BaseModelOutputWithPooling,