delete findSQLToken()

sharding-core/sharding-core-parse/sharding-core-parse-common/src/main/java/org/apache/shardingsphere/core/parse/sql/statement/AbstractSQLStatement.java

@@ -68,17 +68,6 @@ public abstract class AbstractSQLStatement implements SQLStatement {
         sqlTokens.add(sqlToken);
     }
     
-    @Override
-    @SuppressWarnings("unchecked")
-    public final <T extends SQLToken> Optional<T> findSQLToken(final Class<T> sqlTokenType) {
-        for (SQLToken each : sqlTokens) {
-            if (each.getClass().equals(sqlTokenType)) {
-                return Optional.of((T) each);
-            }
-        }
-        return Optional.absent();
-    }
-    
     @Override
     public final List<SQLToken> getSQLTokens() {
         Collections.sort(sqlTokens);

sharding-core/sharding-core-parse/sharding-core-parse-common/src/main/java/org/apache/shardingsphere/core/parse/sql/statement/SQLStatement.java

@@ -76,15 +76,6 @@ public interface SQLStatement {
      */
     void addSQLToken(SQLToken sqlToken);
     
-    /**
-     * Find SQL token.
-     *
-     * @param sqlTokenType SQL token type
-     * @param <T> type of SQL token
-     * @return SQL token
-     */
-    <T extends SQLToken> Optional<T> findSQLToken(Class<T> sqlTokenType);
-    
     /**
      * Get SQL tokens.
      *