Remove `Select HD account` message for Filecoin Import as there is no dropdown any more

[srirambv]

Description

Remove Select HD account message for Filecoin Import as there is no dropdown any more

Steps to Reproduce

1. Import Filecoin account from Ledger
2. Import dialog shows message about switching to HD accounts but there is no option to select HD/legacy

Actual result:

Expected result:

Remove info text if not applicable

Reproduces how often:

Easy

Brave version (brave://version info)

Brave	1.41.39 Chromium: 102.0.5005.78 (Official Build) nightly (64-bit)
Revision	`df6dbb5a9fd82af3f567198af2eb5fb4876ef99c-refs/branch-heads/5005_59@{#3}
OS	Windows 11 Version 22H2 (Build 22621.1)

Version/Channel Information:

• Can you reproduce this issue with the current release? NA
• Can you reproduce this issue with the beta channel? NA
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? NA
• Does the issue resolve itself when disabling Brave Rewards? NA
• Is the issue reproducible on the latest version of Chrome? NA

Miscellaneous Information:

cc: @spylogsster @cypt4 @yrliou

[yrliou]

Don't think it needs to block 1.40.x, removing the 1.40.x milestone.