Remove a useless method

Change-Id: I21a4219f682f43f4a84b1ab12d00dd930b35caa1

java/src/com/android/inputmethod/latin/utils/StringUtils.java

@@ -315,24 +315,6 @@ public final class StringUtils {
         return true;
     }
 
-    /**
-     * Returns true if all code points in text are whitespace, false otherwise. Empty is true.
-     */
-    // Interestingly enough, U+00A0 NO-BREAK SPACE and U+200B ZERO-WIDTH SPACE are not considered
-    // whitespace, while EN SPACE, EM SPACE and IDEOGRAPHIC SPACES are.
-    public static boolean containsOnlyWhitespace(final String text) {
-        final int length = text.length();
-        int i = 0;
-        while (i < length) {
-            final int codePoint = text.codePointAt(i);
-            if (!Character.isWhitespace(codePoint)) {
-                return false;
-            }
-            i += Character.charCount(codePoint);
-        }
-        return true;
-    }
-
     public static boolean isIdenticalAfterCapitalizeEachWord(final String text,
             final int[] sortedSeparators) {
         boolean needsCapsNext = true;

tests/src/com/android/inputmethod/latin/utils/StringAndJsonUtilsTests.java

@@ -285,20 +285,6 @@ public class StringAndJsonUtilsTests extends AndroidTestCase {
         assertTrue(bytesStr.equals(bytesStr2));
     }
 
-    public void testContainsOnlyWhitespace() {
-        assertTrue(StringUtils.containsOnlyWhitespace("   "));
-        assertTrue(StringUtils.containsOnlyWhitespace(""));
-        assertTrue(StringUtils.containsOnlyWhitespace("  \n\t\t"));
-        // U+2002 : EN SPACE
-        // U+2003 : EM SPACE
-        // U+3000 : IDEOGRAPHIC SPACE (commonly "double-width space")
-        assertTrue(StringUtils.containsOnlyWhitespace("\u2002\u2003\u3000"));
-        assertFalse(StringUtils.containsOnlyWhitespace("  a "));
-        assertFalse(StringUtils.containsOnlyWhitespace(". "));
-        assertFalse(StringUtils.containsOnlyWhitespace("."));
-        assertTrue(StringUtils.containsOnlyWhitespace(""));
-    }
-
     public void testJsonUtils() {
         final Object[] objs = new Object[] { 1, "aaa", "bbb", 3 };
         final List<Object> objArray = Arrays.asList(objs);