move amssymb package require to .sty file

sphinx/texinputs/sphinx.sty

@@ -15,6 +15,7 @@
 \RequirePackage{titlesec}
 \RequirePackage{tabulary}
 \RequirePackage{amsmath} % for \text
+\RequirePackage{amssymb} % for some symbols
 \RequirePackage{makeidx}
 \RequirePackage{framed}
 \RequirePackage{ifthen}

sphinx/writers/latex.py

@@ -42,7 +42,6 @@ HEADER = r'''%% Generated by Sphinx.
 %(longtable)s
 \usepackage{sphinx}
 \usepackage{multirow}
-\usepackage{amssymb}
 %(usepackages)s
 %(numfig_format)s
 %(preamble)s