Platform: POSIX: Remove unused variable cc

This change avoids error:

sof/src/platform/posix/ipc.c:90:23: error: unused
variable 'cc' [-Werror,-Wunused-variable]

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

Author: singalsu

src/platform/posix/ipc.c

@@ -87,8 +87,6 @@ static void fuzz_isr(const void *arg)
 	// on only rarely, fill it in manually.
 	*(uint32_t *)global_ipc->comp_data = msgsz;
 
-	struct sof_ipc_comp *cc = global_ipc->comp_data;
-
 	// "Adjust" the command to represent a "comp new" command per
 	// above.  Basically we want to copy in the UUID value for one
 	// of the runtime-enumerated drivers based on data already