contextual help icon on Brave Rewards Panel should be removed

[LaurenWags]

Description

There is an icon of an exclamation point in a circle on the Brave Rewards Panel that doesn't seem to have a purpose or link (it's not mentioned in the spec but it is implemented). Per discussion it should be removed.

Steps to Reproduce

1. If not enabled, enable Rewards.
2. Navigate to a site.
3. Click on the BAT logo.

Actual result:

Next to 'Include in Brave Auto-Contribute' text note the icon.

Expected result:

Icon should be removed.

Reproduces how often:

easy

Brave version (chrome://version info)

Brave	0.55.11 Chromium: 70.0.3538.35 (Official Build) beta(64-bit)
Revision	28dcb499844fa40c28d5f62e337876cb936f79f5-refs/branch-heads/3538@{#678}
OS	Mac OS X

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds? yes
• Does it reproduce on browser-laptop? n/a

Website problems only:

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

Additional Information

[LaurenWags]

Per discussion with @jenn-rhim this contextual help icon should be removed for 1.0. It was meant to explain include/exclude behavior but Jenn said we will see if this is self-explanatory.

[LaurenWags]

Verified passed with

Brave	0.55.13 Chromium: 70.0.3538.54 (Official Build) beta(64-bit)
Revision	4f8e578b6680574714e9ed3bb9f02922b4dde40d-refs/branch-heads/3538@{#937}
OS	Mac OS X

• Verified icon was removed

Verification Passed on

Brave	0.55.13 Chromium: 70.0.3538.54 (Official Build) beta (64-bit)
Revision	4f8e578b6680574714e9ed3bb9f02922b4dde40d-refs/branch-heads/3538@{#937}
OS	Windows

Verification Passed on

Brave	0.55.14 Chromium: 70.0.3538.54 (Official Build) beta(64-bit)
Revision	4f8e578b6680574714e9ed3bb9f02922b4dde40d-refs/branch-heads/3538@{#937}
OS	Linux