[MRG] Fix view command against new --no-redirect option

[redapple]

Fixes #2501

To do:

• Update docs about --no-redirect for view command

[codecov-io]

Codecov Report

Merging #2503 into master will increase coverage by 0.01%.

@@            Coverage Diff             @@
##           master    #2503      +/-   ##
==========================================
+ Coverage   83.45%   83.46%   +0.01%     
==========================================
  Files         161      161              
  Lines        8780     8780              
  Branches     1288     1288              
==========================================
+ Hits         7327     7328       +1     
+ Misses       1205     1204       -1     
  Partials      248      248

Impacted Files	Coverage Δ
scrapy/commands/view.py	58.33% <ø> (ø)	✅
scrapy/utils/python.py	85.45% <ø> (ø)	✅
scrapy/linkextractors/regex.py	95.65% <ø> (+4.34%)	✅

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[redapple]

hm, this adds --headers option to scrapy view, which does not make much sense. Might as well go with #2502

[redapple]

So I just removed the --headers option from the option parser.

[kmike]

Thanks @redapple!