Remove UXPDS support

cde/programs/dtmail/dtmail/AttachArea.C

@@ -47,7 +47,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/stat.h>
-#if defined(USL) || defined(__uxp__)
+#if defined(USL)
 #define S_ISSOCK(mode) ((mode & S_IFMT) == S_IFSOCK)
 #endif
 #include <stdio.h>

cde/programs/dtmail/dtmail/AttachCmds.C

@@ -47,7 +47,7 @@
 #include <fcntl.h>
 #include <stdio.h>
 #include <sys/stat.h>
-#if defined(USL) || defined(__uxp__)
+#if defined(USL)
 #define S_ISSOCK(mode) ((mode & S_IFMT) == S_IFSOCK)
 #endif
 #include <sys/types.h>

cde/programs/dtmail/dtmail/DmxMessage.C

@@ -74,7 +74,7 @@
 // For CHARSET
 #include <LocaleXlate.h>
 #include <locale.h>
-#if !defined(USL) && !defined(__uxp__)
+#if !defined(USL)
 #include <strings.h>
 #else 
 #include <EUSCompat.h>

cde/programs/dtmail/dtmail/RoamApp.C

@@ -70,7 +70,7 @@
 
 #include <unistd.h>
 #include <wchar.h>
-#if defined(USL) || defined(__uxp__) || defined(linux) || defined(CSRG_BASED)
+#if defined(USL) || defined(linux) || defined(CSRG_BASED)
 #define wcswcs wcsstr
 #include <wctype.h>  // iswspace is defined in this header on USL */
 #endif

cde/programs/dtmail/dtmail/RoamMenuWindow.C

@@ -72,11 +72,7 @@
 #include <unistd.h>
 #include <sys/param.h>
 
-#ifdef __uxp__
-#include <string.h>
-#endif
-
-#if !defined(USL) && !defined(__uxp__)
+#if !defined(USL)
 #include <strings.h>
 #endif
 #include <errno.h>