perf/x86/intel/uncore: Remove redundant pci_get_drvdata()

Remove redundant pci_get_drvdata() call.  There's another call a few lines
down, just before we test "box" for NULL.

No functional change intended.
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/20160531212527.28718.92371.stgit@bhelgaas-glaptop2.roam.corp.google.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

arch/x86/events/intel/uncore.c

@@ -974,7 +974,7 @@ static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id
 
 static void uncore_pci_remove(struct pci_dev *pdev)
 {
-	struct intel_uncore_box *box = pci_get_drvdata(pdev);
+	struct intel_uncore_box *box;
 	struct intel_uncore_pmu *pmu;
 	int i, phys_id, pkg;