[pushed: r15-4492] diagnostics: remove forward decl of json::value from diagnostic.h

[David Malcolm]

I believe this hasn't been necessary since r15-1413-gd3878c85f331c7.

Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu.
Pushed to trunk as r15-4492-g83abdb041426b7.

gcc/ChangeLog:
        * diagnostic.h (json::value): Remove forward decl.

Signed-off-by: David Malcolm <dmalc...@redhat.com>
---
 gcc/diagnostic.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/gcc/diagnostic.h b/gcc/diagnostic.h
index edd221f1a8ce..423e07230a65 100644
--- a/gcc/diagnostic.h
+++ b/gcc/diagnostic.h
@@ -220,7 +220,6 @@ public:
 };
 
 class edit_context;
-namespace json { class value; }
 class diagnostic_client_data_hooks;
 class logical_location;
 class diagnostic_diagram;
-- 
2.26.3