removed obsolete workaround when creating polyglot exception text

Author: tomasstupka

com.oracle.truffle.r.launcher/src/com/oracle/truffle/r/launcher/REPL.java

@@ -319,10 +319,6 @@ private static String getErrorText(ExecutorService executor, PolyglotException e
             PolyglotException.StackFrame s = iterator.previous();
             if (s.isHostFrame()) {
                 iterator.remove();
-            } else if (s.getLanguage().getId().equals("R") && s.getRootName() == null) {
-                // TODO: HOTFIX when LLVM
-                // first frame is "<R> null(<REPL>:1:0-13)" ???!!!
-                iterator.remove();
             } else {
                 break;
             }