Remove support for Irix, which is discontinued and does not provide a c++17 complaint compiler.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

kmousetool/kmousetool/Xmd_kmousetool.h

@@ -58,11 +58,6 @@ SOFTWARE.
     defined(__ia64__) || defined(ia64)
 #define LONG64				/* 32/64-bit architecture */
 #endif
-#ifdef __sgi
-#if (_MIPS_SZLONG == 64)
-#define LONG64
-#endif
-#endif
 
 /*
  * Stuff to handle large architecture machines; the constants were generated
@@ -128,7 +123,7 @@ typedef int INT32;
 typedef short INT16;
 #endif
 
-#if defined(__STDC__) || defined(sgi) || defined(AIXV3)
+#if defined(__STDC__) || defined(AIXV3)
 typedef signed char    INT8;
 #else
 typedef char           INT8;