libFLAC :  Remove FLAC__bitreader_read_rice_signed_block_asm_ia32_bswap().

This function was un-used because it showed no speed improvement over the
C version. As a result the bitreader_read_from_client_() function can be
made static again.

Patch-from: lvqcl <lvqcl.mail@gmail.com>
8 files changed