Method remove

src/org/apache/pig/impl/plan/OperatorPlan.java:256–268

Remove an operator from the plan. Any edges that the node has will be removed as well. @param op Operator to remove.

(E op)

     * @param op Operator to remove.
     */
    public void remove(E op) {
        markDirty();

        removeEdges(op, mFromEdges, mToEdges);
        removeEdges(op, mToEdges, mFromEdges);
        
        removeEdges(op, mSoftFromEdges, mSoftToEdges);
        removeEdges(op, mSoftToEdges, mSoftFromEdges);

        // Remove the operator from nodes
        mOps.remove(op);
        mKeys.remove(op.getOperatorKey());
    }

    /**
     * Trim everything below a given operator.  The specified operator will