remove useless comments

mmdet/models/utils/conv_module.py

 import warnings
 
 import torch.nn as nn
+from mmcv.cnn import kaiming_init, constant_init
 
 from .norm import build_norm_layer
 
@@ -51,15 +52,8 @@ class ConvModule(nn.Module):
         self.groups = self.conv.groups
 
         if self.with_norm:
-            # self.norm_type, self.norm_params = parse_norm(normalize)
-            # assert self.norm_type in [None, 'BN', 'SyncBN', 'GN', 'SN']
-            # self.Norm2d = norm_cfg[self.norm_type]
-            if self.activate_last:
-                self.norm = build_norm_layer(normalize, out_channels)
-                # self.norm = self.Norm2d(out_channels, **self.norm_params)
-            else:
-                self.norm = build_norm_layer(normalize, in_channels)
-                # self.norm = self.Norm2d(in_channels, **self.norm_params)
+            norm_channels = out_channels if self.activate_last else in_channels
+            self.norm = build_norm_layer(normalize, norm_channels)
 
         if self.with_activatation:
             assert activation in ['relu'], 'Only ReLU supported.'
@@ -71,13 +65,9 @@ class ConvModule(nn.Module):
 
     def init_weights(self):
         nonlinearity = 'relu' if self.activation is None else self.activation
-        nn.init.kaiming_normal_(
-            self.conv.weight, mode='fan_out', nonlinearity=nonlinearity)
-        if self.with_bias:
-            nn.init.constant_(self.conv.bias, 0)
+        kaiming_init(self.conv, nonlinearity=nonlinearity)
         if self.with_norm:
-            nn.init.constant_(self.norm.weight, 1)
-            nn.init.constant_(self.norm.bias, 0)
+            constant_init(self.norm, 1, bias=0)
 
     def forward(self, x, activate=True, norm=True):
         if self.activate_last: