Fix idea warnings.

Author: javadev

src/main/java/com/github/underscore/U.java

@@ -138,7 +138,7 @@ public boolean test(final E elem) {
                                 .equals(prop.snd())) {
                             return false;
                         }
-                    } catch (Exception e) {
+                    } catch (Exception ignored) {
                     }
                 }
             }
@@ -969,7 +969,7 @@ public <E extends Comparable<? super E>> List<E> sortWith(final Comparator<E> co
     public static <E, T extends Comparable<? super T>> List<E> sortBy(
             final Iterable<E> iterable, final Function<E, T> func) {
         final List<E> sortedList = newArrayList(iterable);
-        sortedList.sort(Comparator.comparing(func::apply));
+        sortedList.sort(Comparator.comparing(func));
         return sortedList;
     }
 
@@ -2044,7 +2044,7 @@ public List<T> interposeByList(final Iterable<T> interIter) {
      * Documented, #bind
      */
     public static <T, F> Function<F, T> bind(final Function<F, T> function) {
-        return function::apply;
+        return function;
     }
 
     /*

src/test/java/com/github/underscore/CollectionsTest.java

@@ -298,7 +298,7 @@ public void reduceWithoutInit() {
         assertEquals("6", result.toString());
         final Integer resultChain = U.chain(asList(1, 2, 3)).reduce(Integer::sum).item().get();
         assertEquals("6", resultChain.toString());
-        U.reduce(new ArrayList<Integer>(), Integer::sum);
+        U.reduce(new ArrayList<>(), Integer::sum);
     }
 
     /*

src/test/java/com/github/underscore/UnderscoreTest.java

@@ -455,7 +455,7 @@ public void optional() {
         try {
             Optional.empty().get();
             fail("IllegalStateException expected");
-        } catch (IllegalStateException ex) {
+        } catch (IllegalStateException ignored) {
         }
         assertFalse(Optional.<Integer>empty().filter(arg -> true).isPresent());
         assertTrue(Optional.<Integer>empty().filter(arg -> false).isEmpty());

src/test/java/com/github/underscore/lodash/LodashTest.java

@@ -1178,7 +1178,7 @@ public void main() {
         U.of(new String[] {});
         U.of(new int[] {});
         U.of("");
-        U.of(new LinkedHashMap<String, Object>());
+        U.of(new LinkedHashMap<>());
     }
 
     @SuppressWarnings("unchecked")