United States v. Gonzalez, 429 F.3d 1252 (9th Cir. Dec. 1, 2005) (failure to inform defendant of alleged right to discretionary relief before he waived appeal of deportation orders did not render waiver unintelligent; application of bar on discretionary relief for aliens convicted of aggravated felony was not impermissibly retroactive as applied to alien who did not have settled expectation of discretionary relief at time of guilty plea to aggravated felony).