[patch][x86] Remove old rounding code

[Koval, Julia]

Hi,
This patch removes old parallel code for avx512er. Parallel in this case can't 
be generated anymore, because all existing patterns were reworked to unspec in 
r249423 and r249009. Ok for trunk?

gcc/
        * gcc/config/i386/i386.c (ix86_erase_embedded_rounding):
        Remove code for old rounding pattern.

Thanks,
Julia

0001-remove-code-for-old-rounding.patch
Description: 0001-remove-code-for-old-rounding.patch