Update collate

collated/main/A0139915Wreused.md

@@ -15,32 +15,3 @@
         return strings.stream().filter(s -> s.contains(query.toLowerCase())).count() > 0;
     }
 ```
-###### \java\seedu\savvytasker\commons\util\StringUtil.java
-``` java
-
-    public static boolean containsIgnoreCase(String source, String query) {
-        String[] split = source.toLowerCase().split("\\s+");
-        List<String> strings = Arrays.asList(split);
-        return strings.stream().filter(s -> s.equals(query.toLowerCase())).count() > 0;
-    }
-
-    /**
-     * Returns a detailed message of the t, including the stack trace.
-     */
-    public static String getDetails(Throwable t){
-        assert t != null;
-        StringWriter sw = new StringWriter();
-        t.printStackTrace(new PrintWriter(sw));
-        return t.getMessage() + "\n" + sw.toString();
-    }
-
-    /**
-     * Returns true if s represents an unsigned integer e.g. 1, 2, 3, ... <br>
-     *   Will return false for null, empty string, "-1", "0", "+1", and " 2 " (untrimmed) "3 0" (contains whitespace).
-     * @param s Should be trimmed.
-     */
-    public static boolean isUnsignedInteger(String s){
-        return s != null && s.matches("^0*[1-9]\\d*$");
-    }
-}
-```