graph-depends: remove unnecessary redirect of stderr

It hides any error messages reported by make.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Acked-by: Samuel Martin <s.martin49@gmail.com>
Tested-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

support/scripts/graph-depends

@@ -82,7 +82,7 @@ allpkgs = []
 def get_targets():
     sys.stderr.write("Getting targets\n")
     cmd = ["make", "-s", "--no-print-directory", "show-targets"]
-    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
+    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, universal_newlines=True)
     output = p.communicate()[0].strip()
     if p.returncode != 0:
         return None
@@ -98,7 +98,7 @@ def get_depends(pkgs):
     cmd = ["make", "-s", "--no-print-directory" ]
     for pkg in pkgs:
         cmd.append("%s-show-depends" % pkg)
-    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
+    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, universal_newlines=True)
     output = p.communicate()[0]
     if p.returncode != 0:
         sys.stderr.write("Error getting dependencies %s\n" % pkgs)