remove unused EXITHELPER_SECOND_OFFICE

Change-Id: If6595b9893be5ffacf0810bcd7f1ba51d42ddd0b
Reviewed-on: https://gerrit.libreoffice.org/63903
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

compilerplugins/clang/unusedenumconstants.untouched.results

@@ -140,10 +140,6 @@ include/desktop/exithelper.h:25
     enum EExitCodes EXITHELPER_NO_ERROR
 include/desktop/exithelper.h:25
     int EXITHELPER_NO_ERROR
-include/desktop/exithelper.h:27
-    int EXITHELPER_SECOND_OFFICE
-include/desktop/exithelper.h:27
-    enum EExitCodes EXITHELPER_SECOND_OFFICE
 include/desktop/exithelper.h:29
     int EXITHELPER_FATAL_ERROR
 include/editeng/borderline.hxx:128

include/desktop/exithelper.h

@@ -23,8 +23,6 @@
 enum EExitCodes {
     /* e.g. used to force showing of the command line help */
     EXITHELPER_NO_ERROR = 0,
-    /* pipe was detected - second office must terminate itself */
-    EXITHELPER_SECOND_OFFICE = 1,
     /* an uno exception was caught during startup */
     EXITHELPER_FATAL_ERROR = 77,
     /* user force automatic restart after crash */