Revert "mshtml: Use QueryService to get IHttpNegotiate in get_post_data_stream."

[Vitaliy Margolen]

This reverts commit c32cca8066807d09e3b953aee9242eba8cfa8cdb.

This patch is obviously wrong since it broke Steam Community page.

See bug 11244
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  dlls/mshtml/persist.c |   35 ++++++++++-------------------------
  1 files changed, 10 insertions(+), 25 deletions(-)
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