Makefile.target: Remove out of date comment

  Remove the out of date comment, i.e., "# libqemu" since libqemu.a is not
available anymore.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Chen Wei-Ren <chenwj@iis.sinica.edu.tw>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/Makefile.target b/Makefile.target
index a111521..7369a89 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -92,8 +92,6 @@
 
 $(libobj-y): $(GENERATED_HEADERS)
 
-# libqemu
-
 translate.o: translate.c cpu.h
 
 translate-all.o: translate-all.c cpu.h