Remove Chromium's "acceptable ads" content setting

[bsclifton]

Description

Remove the Chromium Ads content setting as it's confusing; it could easily be mistaken for Brave shields Adblocking. Per @pes10k:

This setting controls Chromium’s built in “acceptable ads” policy; we block all that stuff so its 99% of the time a NOOP for us. Disabling the preference would probably make things less confusing to Brave users.

Steps to Reproduce

1. Visit slack.com and browse a bit
2. Open brave://settings/content/siteDetails?site=https%3A%2F%2Fslack.com
3. Scroll down until you see Ads and Block if site shows intrusive or misleading ads

Upgrade case can also be found via brave/brave-core#16121 (comment).

Actual result:

Expected result:

There should not be a setting called Ads

[rebron]

Let's keep this in 1.47.x

[kjozwiak]

The above requires 1.47.121 or higher for 1.47.x verification 👍

[MadhaviSeelam]

Verification PASSED using

Brave | 1.47.126 Chromium: 108.0.5359.99 (Official Build) beta (64-bit)
-- | --
Revision | 410951fc34bb4b2cbf182231f9f779efaafaf682-refs/branch-heads/5359_71@{#9}
OS | Windows 11 Version 21H2 (Build 22000.1219)

Case 1: New install/new profile

1. Install 1.47.126
2. launch Brave
3. visit slack.com and browse a bit
4. open brave://settings/content/siteDetails?site=https%3A%2F%2Fslack.com
5. scroll down the page

Confirmed the Ads and Block if site shows intrusive or misleading ads setting is no longer available

Ex1	Ex2

Case 2: Upgrade

1. install 1.46.140
2. launch Brave
3. visit slack.com and browse a bit
4. visit brave://settings/content/siteDetails?site=https%3A%2F%2Fslack.com
5. scroll down the page
6. confirmed Ads and Block if site shows intrusive or misleading ads settings is available
7. close the browser
8. rename the profile Brave Browser Beta
9. launch Brave
10. visit brave://settings/content/siteDetails?site=https%3A%2F%2Fslack.com

Confirmed the Ads and Block if site shows intrusive or misleading ads setting is no longer available

step 1	step 6	results	results