Delete some unused methods from Node.
Delete some unused methods from Node.

#codehealth

PiperOrigin-RevId: 365116821

monetate/closure-compiler,google/closure-compiler,ChadKillingsworth/closure-compiler,ChadKillingsworth/closure-compiler,google/closure-compiler,monetate/closure-compiler,nawawi/closure-compiler,ChadKillingsworth/closure-compiler,google/closure-compiler,nawawi/closure-compiler,monetate/closure-compiler,nawawi/closure-compiler,ChadKillingsworth/closure-compiler,google/closure-compiler,monetate/closure-compiler,nawawi/closure-compiler