Remove extra spacing from clear browsing data bubble for PT/Tor windows

Description

After removing the images from the clear browsing data bubble for PT/Tor windows via https://github.com/brave/brave-core/pull/12643, you’ll notice that there’s some extra space that can be removed to clean things up.

Steps to Reproduce

1. open a Tor or PB window
2. select the Hamburger Menu -> More Tools -> Clear browsing data
3. you’ll notice the extra spacing that appears via the bubble

Actual result:

Tor Window Example	PB Window Example

Expected result:

We should remove the extra spacing after removing the image from the modal via https://github.com/brave/brave-core/pull/12643.

Reproduces how often:

100% reproducible using the STR/Cases outlined above.

Brave version (brave://version info)

Brave | 1.38.57 Chromium: 99.0.4844.74 (Official Build) nightly (64-bit)
-- | --
Revision | fee9a47e86e981802390cb0d41c5ed7ea93c4f6f-refs/branch-heads/4844@{#1060}
OS | Windows 11 Version 21H2 (Build 22000.556)

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Yes
• 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? N/A

Miscellaneous Information:

[fallaciousreasoning]

You might also be able to remove the close button with SetShowCloseButton in chrome/browser/ui/views/incognito_clear_browsing_data_dialog.cc#77 (via a patch like @bsclifton mentioned)

[stephendonner]

Verified PASSED using

Brave	1.44.73 Chromium: 105.0.5195.68 (Official Build) beta (x86_64)
Revision	ad13e82529051bac6a0e65f455e6d7a1e5fd7938-refs/branch-heads/5195@{#903}
OS	macOS Version 13.0 (Build 22A5331f)

Steps:

1. installed 1.44.73
2. launched Brave
3. launched a Private window via "hamburger menu" -> New Private Window
4. launched a Private window with Tor via "hamburger menu" -> New Private Window with Tor
5. launched a Guest window via "hamburger menu" -> Open Guest Window
6. in each, selected "hamburger menu" -> More Tools -> Clear Browsing Data...
7. examined and confirmed fixed vertical spacing in the Cancel Close Windows dialog

Private window	Private window with Tor	Guest window (unavailable)