* config/mips/xm-iris5.h: Remove, unnecessary.
	* config.build (mips-sgi-irix5*): Remove.
	(mips-sgi-irix6*o32): Likewise.
	* config.gcc (mips-sgi-irix6*o32): Remove xm_file.
	(mips-sgi-irix5cross64): Likewise.
	(mips-sgi-irix5*): Likewise.
	* config.host (mips-sgi-irix5*): Remove.
	(mips-sgi-irix6*o32): Likewise.

From-SVN: r72003