systemc: Get rid of the unused Process::_procKind.

This seems to be a leftover from an earlier implementation.

Change-Id: I63d7e576fd3c11cf73769c34bbc97a4d3bbbdaeb
Reviewed-on: https://gem5-review.googlesource.com/c/13311
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
diff --git a/src/systemc/core/process.hh b/src/systemc/core/process.hh
index 17961c7..0331f07 100644
--- a/src/systemc/core/process.hh
+++ b/src/systemc/core/process.hh
@@ -160,7 +160,6 @@
     InternalScEvent _terminatedEvent;
 
     ProcessFuncWrapper *func;
-    sc_core::sc_curr_proc_kind _procKind;
 
     bool _internal;