LaTeX reader: don't parse _,^ as super/sub outside math mode.

src/Text/Pandoc/Readers/LaTeX.hs

@@ -200,8 +200,6 @@ inline = (mempty <$ comment)
      <|> (str "\160" <$ char '~')
      <|> mathDisplay (string "$$" *> mathChars <* string "$$")
      <|> mathInline  (char '$' *> mathChars <* char '$')
-     <|> try (superscript <$> (char '^' *> tok))
-     <|> (subscript <$> (char '_' *> tok))
      <|> (guardEnabled Ext_literate_haskell *> char '|' *> doLHSverb)
      <|> (str . (:[]) <$> tildeEscape)
      <|> (str . (:[]) <$> oneOf "[]")