[ruby/net-http] Revert "Update the content-length heading when decoding bodies"

This reverts commit https://github.com/ruby/net-http/commit/a7cb30124cf1.

This is causing errors in Ruby's CI, will revert for now and
try again after testing a fix with Ruby's CI.

https://github.com/ruby/net-http/commit/7b852b1feb

lib/net/http/response.rb

@@ -263,7 +263,6 @@ class Net::HTTPResponse
     case v&.downcase
     when 'deflate', 'gzip', 'x-gzip' then
       self.delete 'content-encoding'
-      had_content_length = self.delete 'content-length'
 
       inflate_body_io = Inflater.new(@socket)
 
@@ -273,9 +272,6 @@ class Net::HTTPResponse
       ensure
         begin
           inflate_body_io.finish
-          if had_content_length
-            self['content-length'] = inflate_body_io.bytes_inflated.to_s
-          end
         rescue => err
           # Ignore #finish's error if there is an exception from yield
           raise err if success
@@ -377,14 +373,6 @@ class Net::HTTPResponse
       @inflate.finish
     end
 
-    ##
-    # The number of bytes inflated, used to update the Content-Length of
-    # the response.
-
-    def bytes_inflated
-      @inflate.total_out
-    end
-
     ##
     # Returns a Net::ReadAdapter that inflates each read chunk into +dest+.
     #

test/net/http/test_httpresponse.rb

@@ -127,11 +127,9 @@ EOS
 
     if Net::HTTP::HAVE_ZLIB
       assert_equal nil, res['content-encoding']
-      assert_equal '5', res['content-length']
       assert_equal 'hello', body
     else
       assert_equal 'deflate', res['content-encoding']
-      assert_equal '13', res['content-length']
       assert_equal "x\x9C\xCBH\xCD\xC9\xC9\a\x00\x06,\x02\x15", body
     end
   end
@@ -157,11 +155,9 @@ EOS
 
     if Net::HTTP::HAVE_ZLIB
       assert_equal nil, res['content-encoding']
-      assert_equal '5', res['content-length']
       assert_equal 'hello', body
     else
       assert_equal 'DEFLATE', res['content-encoding']
-      assert_equal '13', res['content-length']
       assert_equal "x\x9C\xCBH\xCD\xC9\xC9\a\x00\x06,\x02\x15", body
     end
   end
@@ -192,11 +188,9 @@ EOS
 
     if Net::HTTP::HAVE_ZLIB
       assert_equal nil, res['content-encoding']
-      assert_equal nil, res['content-length']
       assert_equal 'hello', body
     else
       assert_equal 'deflate', res['content-encoding']
-      assert_equal nil, res['content-length']
       assert_equal "x\x9C\xCBH\xCD\xC9\xC9\a\x00\x06,\x02\x15", body
     end
   end
@@ -221,7 +215,6 @@ EOS
     end
 
     assert_equal 'deflate', res['content-encoding'], 'Bug #7831'
-    assert_equal '13', res['content-length']
     assert_equal "x\x9C\xCBH\xCD\xC9\xC9\a\x00\x06,\x02\x15", body, 'Bug #7381'
   end
 
@@ -245,11 +238,9 @@ EOS
 
     if Net::HTTP::HAVE_ZLIB
       assert_equal nil, res['content-encoding']
-      assert_equal nil, res['content-length']
       assert_equal 'hello', body
     else
       assert_equal 'deflate', res['content-encoding']
-      assert_equal nil, res['content-length']
       assert_equal "x\x9C\xCBH\xCD\xC9\xC9\a\x00\x06,\x02\x15\r\n", body
     end
   end
@@ -297,11 +288,9 @@ EOS
 
     if Net::HTTP::HAVE_ZLIB
       assert_equal nil, res['content-encoding']
-      assert_equal '0', res['content-length']
       assert_equal '', body
     else
       assert_equal 'deflate', res['content-encoding']
-      assert_equal '0', res['content-length']
       assert_equal '', body
     end
   end
@@ -325,11 +314,9 @@ EOS
 
     if Net::HTTP::HAVE_ZLIB
       assert_equal nil, res['content-encoding']
-      assert_equal nil, res['content-length']
       assert_equal '', body
     else
       assert_equal 'deflate', res['content-encoding']
-      assert_equal nil, res['content-length']
       assert_equal '', body
     end
   end