Stop logging sites to stdout on exit

[jumde]

https://github.com/brave/brave-core/blob/ac766becf4eadaa53a90ba897781878c8a71db82/vendor/bat-native-ledger/src/bat/ledger/internal/media/twitch.cc#L181

Logs all sites visited by user to stdout.

Repro Steps:

1. Open Brave Browser using terminal (/Applications/Brave\ Browser\ Nightly.app/Contents/MacOS/Brave\ Browser\ Nightly)
2. Navigate to any site and see that logs of the URL you visited will be printed on the console

Test Plan

Specified here: brave/brave-core#2435

[kjozwiak]

Verification PASSED on macOS 10.14.5 x64 using the following build:

Brave	0.65.113 Chromium: 75.0.3770.38 (Official Build) beta(64-bit)
Revision	3860105745f2b12537da9e9f048f14c3f52ba970-refs/branch-heads/3770@{#618}
OS	Mac OS X

• reproduced the original issue using 0.65.89 Chromium: 74.0.3729.131
• ensured websites are not being logged in terminal when visited when using normal tabs
• ensured websites are not being logged in terminal when visited when using Tor
• ensured websites are not being logged in terminal when visited when using PB
• ensured websites are not being logged in terminal when visited when using Guest mode

[srirambv]

Verification passed on

Brave	0.65.113 Chromium: 75.0.3770.38 (Official Build) beta(64-bit)
Revision	3860105745f2b12537da9e9f048f14c3f52ba970-refs/branch-heads/3770@{#618}
OS	Linux

• Verified no site info is logged in normal/private/Tor windows

Verification passed on

Brave	0.65.114 Chromium: 75.0.3770.38 (Official Build) (64-bit)
Revision	3860105745f2b12537da9e9f048f14c3f52ba970-refs/branch-heads/3770@{#618}
OS	Windows 10 OS Version 1803 (Build 17134.765)

• Verified no site info is logged in normal/private/Tor windows