[binutils-gdb] S/390: Remove optional operand flag.

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT bfcfbe611b4d7e650236f8b8ba7d0706cfe6a0b7 ***

Author: Andreas Krebbel <krebbel@linux.vnet.ibm.com>
Branch: master
Commit: bfcfbe611b4d7e650236f8b8ba7d0706cfe6a0b7

S/390: Remove optional operand flag.

The per operand optional flag hasn't been used for quite some time.
Cleanup some remains.

include/ChangeLog:

2017-05-30  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* opcode/s390.h: Remove S390_OPERAND_OPTIONAL.

gas/ChangeLog:

2017-05-30  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* config/tc-s390.c (md_gather_operands): Remove code dealing with
	S390_OPERAND_OPTIONAL.