trace: [simple] Do not include "trace/simple.h" in generated tracer headers

The header is not necessary, given that the simple backend does not define any
inlined tracing routines.

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

scripts/tracetool/backend/simple.py

@@ -93,9 +93,6 @@ def c(events):
 
 
 def h(events):
-    out('#include "trace/simple.h"',
-        '')
-
     for event in events:
         out('void trace_%(name)s(%(args)s);',
             name = event.name,

trace/simple.c

@@ -19,6 +19,7 @@
 #include "qemu/timer.h"
 #include "trace.h"
 #include "trace/control.h"
+#include "trace/simple.h"
 
 /** Trace file header event ID */
 #define HEADER_EVENT_ID (~(uint64_t)0) /* avoids conflicting with TraceEventIDs */