delete StringUtilsTest#testIsEmpty, #testIsNotEmpty, #testIsBlank and #testIsNotBlank, because these tests are redundant with StringUtilsTrimEmptyTest#testIsEmpty, #testIsNotEmpty, #testIsBlank and #testIsNotBlank (closes #175, closes #176)
diff --git a/src/test/java/org/apache/commons/lang3/StringUtilsTest.java b/src/test/java/org/apache/commons/lang3/StringUtilsTest.java
index 0f14764..5ef73fe 100644
--- a/src/test/java/org/apache/commons/lang3/StringUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/StringUtilsTest.java
@@ -124,23 +124,6 @@
     }
 
     //-----------------------------------------------------------------------
-    @Test
-    public void testIsEmpty() {
-        assertTrue(StringUtils.isEmpty(null));
-        assertTrue(StringUtils.isEmpty(""));
-        assertFalse(StringUtils.isEmpty(" "));
-        assertFalse(StringUtils.isEmpty("bob"));
-        assertFalse(StringUtils.isEmpty("  bob  "));
-    }
-
-    @Test
-    public void testIsNotEmpty() {
-        assertFalse(StringUtils.isNotEmpty(null));
-        assertFalse(StringUtils.isNotEmpty(""));
-        assertTrue(StringUtils.isNotEmpty(" "));
-        assertTrue(StringUtils.isNotEmpty("bob"));
-        assertTrue(StringUtils.isNotEmpty("  bob  "));
-    }
 
     @Test
     public void testIsAnyEmpty() {
@@ -167,24 +150,6 @@
     }
 
     @Test
-    public void testIsBlank() {
-        assertTrue(StringUtils.isBlank(null));
-        assertTrue(StringUtils.isBlank(""));
-        assertTrue(StringUtils.isBlank(" "));
-        assertFalse(StringUtils.isBlank("bob"));
-        assertFalse(StringUtils.isBlank("  bob  "));
-    }
-
-    @Test
-    public void testIsNotBlank() {
-        assertFalse(StringUtils.isNotBlank(null));
-        assertFalse(StringUtils.isNotBlank(""));
-        assertFalse(StringUtils.isNotBlank(" "));
-        assertTrue(StringUtils.isNotBlank("bob"));
-        assertTrue(StringUtils.isNotBlank("  bob  "));
-    }
-
-    @Test
     public void testIsAnyBlank() {
         assertTrue(StringUtils.isAnyBlank((String) null));
         assertTrue(StringUtils.isAnyBlank((String[]) null));