re-remove lost during rebase

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/PosixResources.java

@@ -174,7 +174,6 @@ void setNewChannel(OutputStream outputStream) {
     public PosixResources() {
         files = Collections.synchronizedSortedMap(new TreeMap<>());
         filePaths = Collections.synchronizedMap(new HashMap<>());
-        sockets = Collections.synchronizedList(new ArrayList<>());
         children = Collections.synchronizedList(new ArrayList<>());
         String osProperty = System.getProperty("os.name");