Remove ThreadDeath usage, it is deprecated and scheduled for removal.

Author: andreasrosdalw

openpdf-html/src/main/java/org/openpdf/swing/BasicPanel.java

@@ -142,8 +142,6 @@ protected void doRender(RenderingContext c, Layer root) {
             if (Configuration.isTrue("xr.incremental.repaint.print-timing", false)) {
                 Uu.p("repaint took ms: " + (after - start));
             }
-        } catch (ThreadDeath t) {
-            throw t;
         } catch (Error | RuntimeException t) {
             if (hasDocumentListeners()) {
                 fireOnRenderException(t);

openpdf-html/src/main/java/org/openpdf/swing/RootPanel.java

@@ -351,8 +351,6 @@ public void run() {
                     }
                 });
             }*/
-        } catch (ThreadDeath t) {
-            throw t;
         } catch (Error | RuntimeException t) {
             if (hasDocumentListeners()) {
                 fireOnLayoutException(t);