i965/fs: Drop fs_inst::force_uncompressed.
i965/fs: Drop fs_inst::force_uncompressed.

This is now unused.  Saves a whole bit of memory per instruction.

Reviewed-by: Matt Turner <789b315743a28dd066a4ba1459c35951c291d8a6@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler