Revert "new `'packages' key to latex_elements`"

This reverts commit 9972d729ab.

doc/config.rst

@@ -1720,13 +1720,8 @@ These options influence LaTeX output. See further :doc:`latex`.
         the "Bjarne" style uses numbers spelled out in English).  Other
         "fncychap" styles you can try are "Lenny", "Glenn", "Conny", "Rejne" and
         "Bjornstrup".  You can also set this to ``''`` to disable fncychap.
-     ``'packages'``
-        Extra user specified ``\\usepackage{<foo>}`` commands, default empty,
-        executed *after* the loading of :file:`sphinx.sty` and *before* the
-        loading of "hyperref".
      ``'preamble'``
-        Additional preamble content, default empty. Executed *after*
-        the loading of "hyperref" package. See :doc:`latex`.
+        Additional preamble content, default empty. See :doc:`latex`.
      ``'postamble'``
         Additional postamble content (before the indices), default empty.
      ``'figure_align'``

sphinx/templates/latex/content.tex_t

@@ -20,7 +20,6 @@
 \usepackage{multirow}
 \usepackage{eqparbox}
 <%= usepackages %>
-<%= packages %>
 <%= hyperref %>
 <%= contentsname %>
 <%= numfig_format %>

sphinx/writers/latex.py

@@ -278,7 +278,6 @@ class LaTeXTranslator(nodes.NodeVisitor):
         'fontpkg':         '\\usepackage{times}',
         'fncychap':        '\\usepackage[Bjarne]{fncychap}',
         'longtable':       '\\usepackage{longtable}',
-        'packages':        '',
         'hyperref':        ('% Include hyperref last.\n'
                             '\\usepackage[colorlinks,breaklinks,%\n'
                             '            '