Chore: remove code around deprecated APIs

[jennifer-shehane]

What would you like?

We want to remove warnings / code around deprecated APIS.

Why is this needed?

• It's just unnecessary code to maintain.
• We could potentially reuse these APIs if we want.

Deprecated / Removed values

API	Version Removed	If used?
cy.privates	Long time ago	throws warning
cy.props	Long time ago	throws warning
Cypress.Log.command()	Long time ago	throws warning
eventually chainer	0.11.0	throws warning
requestJSON prop on XHRs	0.12.0	throws warning
responseJSON prop on XHRs	0.12.0	throws warning
cy.wait(fn)	0.11.4	throws warning
cy.server({stub: false})	0.13.2	throws warning
cy.server({force404: false })	0.13.5	now default, throws warning
Cypress.Cookies.get	0.16.0	throws warning
Cypress.Cookies.set	0.16.0	throws warning
Cypress.Cookies.remove	0.16.0	throws warning
Cypress.Cookies.getAllCookies	0.16.0	throws warning
Cypress.Cookies.clearCookies	0.16.0	throws warning
cy.request() failOnStatus	0.18.1	throws warning
cy.agents()	0.18.8	throws warning
cypress ci command	0.19.0	supposed to warn, I'm not sure this even works
CYPRESS_CI_KEY	0.19.0	throws warning
Cypress.addParentCommand()	0.20.0	throws warning
Cypress.addChildCommand()	0.20.0	throws warning
Cypress.addDualCommand()	0.20.0	throws warning
CYPRESS_BINARY_VERSION	3.0.0	throws warning
CYPRESS_SKIP_BINARY_INSTALL	3.0.0	throws warning
screenshotOnHeadlessFailure	3.0.0	throws warning
trashAssetsBeforeHeadlessRuns	3.0.0	throws warning
videoRecording	3.0.0	throws warning

Outside of the scope of this work

We will not be removing code around these deprecated APIs, since there are still some using on versions prior to 4.0.0 that we want to have a good experience when upgrading to our latest version.

API	Version Removed	If used?
before:browser:launch args	4.0.0	still works, throws deprecation warning
Cypress.Cookies.defaults whitelist	5.0.0	throws warning
blacklistHosts	5.0.0	throws warning
cy.server() whitelist	5.0.0	throws warning
experimentalGetCookiesSameSite	5.0.0	throws warning
experimentalShadowDomSupport	5.2.0	throws warning

[cypress-bot]

The code for this is done in cypress-io/cypress#8951, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

Released in 6.0.0.

This comment thread has been locked. If you are still experiencing this issue after upgrading to
Cypress v6.0.0, please open a new issue.