Clean up unused `Silence` module (#13674)

ultralytics/cfg/models/v9/yolov9e-seg.yaml

@@ -7,7 +7,7 @@ nc: 80 # number of classes
 
 # gelan backbone
 backbone:
-  - [-1, 1, Silence, []]
+  - [-1, 1, nn.Identity, []]
   - [-1, 1, Conv, [64, 3, 2]] # 1-P1/2
   - [-1, 1, Conv, [128, 3, 2]] # 2-P2/4
   - [-1, 1, RepNCSPELAN4, [256, 128, 64, 2]] # 3

ultralytics/cfg/models/v9/yolov9e.yaml

@@ -7,7 +7,7 @@ nc: 80 # number of classes
 
 # gelan backbone
 backbone:
-  - [-1, 1, Silence, []]
+  - [-1, 1, nn.Identity, []]
   - [-1, 1, Conv, [64, 3, 2]] # 1-P1/2
   - [-1, 1, Conv, [128, 3, 2]] # 2-P2/4
   - [-1, 1, RepNCSPELAN4, [256, 128, 64, 2]] # 3

ultralytics/nn/modules/__init__.py

@@ -45,7 +45,6 @@ from .block import (
     RepC3,
     RepNCSPELAN4,
     ResNetLayer,
-    Silence,
 )
 from .conv import (
     CBAM,
@@ -134,5 +133,4 @@ __all__ = (
     "SPPELAN",
     "CBFuse",
     "CBLinear",
-    "Silence",
 )

ultralytics/nn/tasks.py

@@ -47,7 +47,6 @@ from ultralytics.nn.modules import (
     ResNetLayer,
     RTDETRDecoder,
     Segment,
-    Silence,  # noqa (equivalent to nn.Identity, unused in file but required to load YOLOv9 models)
     WorldDetect,
 )
 from ultralytics.utils import DEFAULT_CFG_DICT, DEFAULT_CFG_KEYS, LOGGER, colorstr, emojis, yaml_load