fixed checkstyle issues

Author: iqbxl

src/main/java/seedu/address/logic/parser/TimetableAddLessonCommandParser.java

@@ -9,7 +9,6 @@
 import java.util.stream.Stream;
 
 import seedu.address.logic.commands.TimetableAddLessonCommand;
-import seedu.address.logic.commands.TimetableAddRoutineCommand;
 import seedu.address.logic.parser.exceptions.ParseException;
 import seedu.address.model.person.Day;
 import seedu.address.model.person.Duration;

src/main/java/seedu/address/logic/parser/TimetableDeleteSlotCommandParser.java

@@ -6,7 +6,6 @@
 
 import java.util.stream.Stream;
 
-import seedu.address.logic.commands.TimetableAddRoutineCommand;
 import seedu.address.logic.commands.TimetableDeleteSlotCommand;
 import seedu.address.logic.parser.exceptions.ParseException;
 import seedu.address.model.person.Day;