Style and removing debug message.

Author: ppisl

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/PosixModuleBuiltins.java

@@ -600,7 +600,6 @@ Object listdir(VirtualFrame frame, String path) {
                 throw raiseOSError(frame, OSErrorEnum.ENOENT, path);
             } catch (SecurityException | IOException e) {
                 gotException.enter();
-                System.out.println("OSError Pos02");
                 throw raise(OSError, path);
             }
         }
@@ -1801,7 +1800,7 @@ String readlink(String str, @SuppressWarnings("unused") PNone none) {
     @GenerateNodeFactory
     public abstract static class StrErrorNode extends PythonBuiltinNode {
 
-        private final static HashMap<Integer, String> STR_ERROR_MAP = new HashMap<Integer, String>();
+        private final static HashMap<Integer, String> STR_ERROR_MAP = new HashMap<>();
 
         @Specialization
         String getStrError(int errno) {

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/PNodeWithContext.java

@@ -48,7 +48,6 @@
 import com.oracle.graal.python.builtins.objects.function.PKeyword;
 import com.oracle.graal.python.builtins.objects.type.LazyPythonClass;
 import com.oracle.graal.python.builtins.objects.type.PythonClass;
-import com.oracle.graal.python.nodes.argument.positional.PositionalArgumentsNode;
 import com.oracle.graal.python.nodes.attributes.LookupAttributeInMRONode;
 import com.oracle.graal.python.nodes.attributes.WriteAttributeToObjectNode;
 import com.oracle.graal.python.nodes.call.special.CallVarargsMethodNode;