Remove unused methods and classes

package com.android.inputmethod.latin;

import android.text.TextUtils;

import android.view.inputmethod.ExtractedText;

import android.view.inputmethod.ExtractedTextRequest;

import android.view.inputmethod.InputConnection;

    private static final Pattern spaceRegex = Pattern.compile("\\s+");

    public static CharSequence getPreviousWord(InputConnection connection,

            String sentenceSeperators) {

        //TODO: Should fix this. This could be slow!

        return w[w.length - 1];

    }

    public static class SelectedWord {

        public final int mStart;

        public final int mEnd;

        public final CharSequence mWord;

        public SelectedWord(int start, int end, CharSequence word) {

            mStart = start;

            mEnd = end;

            mWord = word;

        }

    }

    /**

     * Takes a character sequence with a single character and checks if the character occurs

     * in a list of word separators or is empty.

     * @param singleChar A CharSequence with null, zero or one character

     * @param wordSeparators A String containing the word separators

     * @return true if the character is at a word boundary, false otherwise

     */

    private static boolean isWordBoundary(CharSequence singleChar, String wordSeparators) {

        return TextUtils.isEmpty(singleChar) || wordSeparators.contains(singleChar);

    }

    /**

     * Checks if the cursor is inside a word or the current selection is a whole word.

     * @param ic the InputConnection for accessing the text field

     * @param selStart the start position of the selection within the text field

     * @param selEnd the end position of the selection within the text field. This could be

     *               the same as selStart, if there's no selection.

     * @param wordSeparators the word separator characters for the current language

     * @return an object containing the text and coordinates of the selected/touching word,

     *         null if the selection/cursor is not marking a whole word.

     */

    public static SelectedWord getWordAtCursorOrSelection(final InputConnection ic,

            int selStart, int selEnd, String wordSeparators) {

        if (selStart == selEnd) {

            // There is just a cursor, so get the word at the cursor

            // getWordRangeAtCursor returns null if the connection is null

            final EditingUtils.Range range = getWordRangeAtCursor(ic, wordSeparators);

            if (range != null && !TextUtils.isEmpty(range.mWord)) {

                return new SelectedWord(selStart - range.mCharsBefore, selEnd + range.mCharsAfter,

                        range.mWord);

            }

        } else {

            if (null == ic) return null;

            // Is the previous character empty or a word separator? If not, return null.

            final CharSequence charsBefore = ic.getTextBeforeCursor(1, 0);

            if (!isWordBoundary(charsBefore, wordSeparators)) {

                return null;

            }

            // Is the next character empty or a word separator? If not, return null.

            final CharSequence charsAfter = ic.getTextAfterCursor(1, 0);

            if (!isWordBoundary(charsAfter, wordSeparators)) {

                return null;

            }

            // Extract the selection alone

            final CharSequence touching = ic.getSelectedText(0);

            if (TextUtils.isEmpty(touching)) return null;

            // Is any part of the selection a separator? If so, return null.

            final int length = touching.length();

            for (int i = 0; i < length; i++) {

                if (wordSeparators.contains(touching.subSequence(i, i + 1))) {

                    return null;

                }

            }

            // Prepare the selected word

            return new SelectedWord(selStart, selEnd, touching);

        }

        return null;

    }

}