[Fix] Delete unnecessary lines of STDCHead

[MengzhangLI]

Motivation

In related Issue: #1230.

It is unnecessary to use F.interpolate in STDCHead because in BaseDecodeHead.losses it already uses resize( ) in

mmsegmentation/mmseg/models/decode_heads/decode_head.py

Lines 232 to 239 in 4b905cb

	def losses(self, seg_logit, seg_label):
	"""Compute segmentation loss."""
	loss = dict()
	seg_logit = resize(
	input=seg_logit,
	size=seg_label.shape[2:],
	mode='bilinear',
	align_corners=self.align_corners)

.

Config names	ss mIoU (old)	ss mIoU (this PR)
stdc1_512x1024_80k_cityscapes.py	71.52	71.0
stdc1_in1k-pre_512x1024_80k_cityscapes.py	75.10	75.06
stdc2_512x1024_80k_cityscapes.py	73.20	73.62
stdc2_in1k-pre_512x1024_80k_cityscapes.py	77.17	76.9

[codecov]

Codecov Report

Merging #1231 (8654fe8) into master (4b905cb) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1231      +/-   ##
==========================================
- Coverage   90.24%   90.24%   -0.01%     
==========================================
  Files         128      128              
  Lines        7464     7463       -1     
  Branches     1241     1241              
==========================================
- Hits         6736     6735       -1     
  Misses        524      524              
  Partials      204      204              

Flag	Coverage Δ
unittests	90.24% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmseg/models/decode_heads/stdc_head.py	100.00% <ø> (ø)

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