[gcc r11-3513] analyzer: remove unused field

[David Malcolm]

https://gcc.gnu.org/g:20d16d61dd22a9bfb66d5c4a383d193037e8f16d

commit r11-3513-g20d16d61dd22a9bfb66d5c4a383d193037e8f16d
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Mon Sep 28 16:53:53 2020 -0400

    analyzer: remove unused field
    
    I added this field (and the struct itself) in the rewrite of region and
    value-handling (808f4dfeb3a95f50f15e71148e5c1067f90a126d), but the field
    was never used.
    
    Found by cppcheck.
    
    gcc/analyzer/ChangeLog:
            * diagnostic-manager.cc (null_assignment_sm_context::m_visitor):
            Remove unused field.

Diff:
---
 gcc/analyzer/diagnostic-manager.cc | 1 -
 1 file changed, 1 deletion(-)

diff --git a/gcc/analyzer/diagnostic-manager.cc b/gcc/analyzer/diagnostic-manager.cc
index 13dd3da606f..cb95a95ff0b 100644
--- a/gcc/analyzer/diagnostic-manager.cc
+++ b/gcc/analyzer/diagnostic-manager.cc
@@ -931,7 +931,6 @@ struct null_assignment_sm_context : public sm_context
   const program_state *m_new_state;
   const gimple *m_stmt;
   const program_point *m_point;
-  state_change_visitor *m_visitor;
   checker_path *m_emission_path;
   const extrinsic_state &m_ext_state;
 };