perf tools: Remove unused PYRF_OBJS variable on Makefile

It seems that the PYRF_OBJS variable is not used anymore or has no
effect at least.  The util/setup.py tracks its dependency using
util/python-ext-sources file and resulting objects are saved under
python_ext_build/tmp/.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1348824728-14025-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile

@@ -185,7 +185,7 @@ strip-libs = $(filter-out -l%,$(1))
 PYTHON_EXT_SRCS := $(shell grep -v ^\# util/python-ext-sources)
 PYTHON_EXT_DEPS := util/python-ext-sources util/setup.py
 
-$(OUTPUT)python/perf.so: $(PYRF_OBJS) $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS)
+$(OUTPUT)python/perf.so: $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS)
 	$(QUIET_GEN)CFLAGS='$(BASIC_CFLAGS)' $(PYTHON_WORD) util/setup.py \
 	  --quiet build_ext; \
 	mkdir -p $(OUTPUT)python && \
@@ -446,20 +446,6 @@ BUILTIN_OBJS += $(OUTPUT)builtin-inject.o
 
 PERFLIBS = $(LIB_FILE) $(LIBTRACEEVENT)
 
-# Files needed for the python binding, perf.so
-# pyrf is just an internal name needed for all those wrappers.
-# This has to be in sync with what is in the 'sources' variable in
-# tools/perf/util/setup.py
-
-PYRF_OBJS += $(OUTPUT)util/cpumap.o
-PYRF_OBJS += $(OUTPUT)util/ctype.o
-PYRF_OBJS += $(OUTPUT)util/evlist.o
-PYRF_OBJS += $(OUTPUT)util/evsel.o
-PYRF_OBJS += $(OUTPUT)util/python.o
-PYRF_OBJS += $(OUTPUT)util/thread_map.o
-PYRF_OBJS += $(OUTPUT)util/util.o
-PYRF_OBJS += $(OUTPUT)util/xyarray.o
-
 #
 # Platform specific tweaks
 #