[CR 110] remove Block third-party cookies in Private setting

[rebron]

Description

Remove Block third-party cookies setting in Private as it's unnecessary and conflicts with Shields.
See: brave://settings/cookies

Actual result:

Expected result:

Reproduces how often:

Easily.

Brave version (brave://version info)

1.49.x with Chromium 110

Version/Channel Information:

• Can you reproduce this issue with the current release? n/a
• Can you reproduce this issue with the beta channel? n/a
• Can you reproduce this issue with the nightly channel? yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? n/a
• Does the issue resolve itself when disabling Brave Rewards? n/a
• Is the issue reproducible on the latest version of Chrome? yes

Miscellaneous Information:

[bridiver]

I don't understand, how does this conflict with shields? This is the default setting that we use.

[emerick]

I think there's a typo in this issue @rebron. It should be referencing the second radio button labelled "Block third-party cookies in Private".

[bridiver]

Do you mean remove "block third party cookies in private"?

[rebron]

Correct. Block third party cookies in private setting.

[kjozwiak]

We'll move back into 1.48.x once brave/brave-core#16884 has been merged into 1.48.x.

[kjozwiak]

The above requires 1.48.153 or higher for 1.48.x verification 👍

[stephendonner]

@brave/qa-team this is blocked by #28261 👍

[LaurenWags]

Removed QA/Blocked as this can be verified in 1.48.155 and higher where #28261 is included.

[LaurenWags]

Verified with

Brave | 1.48.155 Chromium: 110.0.5481.77 (Official Build) (x86_64)
-- | --
Revision | 65ed616c6e8ee3fe0ad64fe83796c020644d42af-refs/branch-heads/5481@{#839}
OS | macOS Version 12.6.3 (Build 21G419)

Confirmed Block third-party cookies in Private setting is no longer displayed under brave://settings/cookies.

[LaurenWags]

Removed QA/Test-All-Platforms label per discussion with @kjozwiak @rebron but we will want to verify this one on Windows.

[MadhaviSeelam]

Verification PASSED with

Brave | 1.48.155 Chromium: 110.0.5481.77 (Official Build) (64-bit)
-- | --
Revision | 65ed616c6e8ee3fe0ad64fe83796c020644d42af-refs/branch-heads/5481@{#839}
OS | Windows 11 Version 21H2 (Build 22000.1455)

Install 1.48.155
launch Brave
open brave://settings/cookies

Confirmed Block third-party cookies in Private setting is no longer displayed.