Remove YubiKey references from onboarding handbook pages (#43104)

## Summary

- Removes YubiKey/Yubikey mentions from onboarding-related handbook
pages
- Security policy pages (`handbook/it/security.md`) are intentionally
**not** modified

## Changes

### `handbook/it/README.md`
- Removed "and YubiKey security keys" from the equipment provisioning
intro
- Removed the bullet item to order YubiKey 5C NFC keys for new team
members
- Removed "and include Yubikeys (if requested)" from the shipping
checklist

### `handbook/company/leadership.md`
- Removed "do NOT receive Yubikeys" from the consultant distinction list
(no longer relevant since YubiKeys are not part of onboarding)
- Removed "and Yubikeys" from the core team member hiring description

### `handbook/company/communications.md`
- Removed "YubiKey security keys," from the tools & equipment overview

---

Built for [Isabell
Reedy](https://fleetdm.slack.com/archives/D0AEGJCGJR0/p1775558324267559?thread_ts=1775484858.521199&cid=D0AEGJCGJR0)
by [Kilo for Slack](https://kilo.ai/features/slack-integration)

Co-authored-by: kiloconnect[bot] <240665456+kiloconnect[bot]@users.noreply.github.com>

handbook/company/communications.md

@@ -636,7 +636,7 @@ When Fleeties relocate, there are vendors that need to be notified of the change
 
 ## Tools and equipment
 
-Fleet provides laptops, YubiKey security keys, and software licenses for core team members to use while working at Fleet. If you need new equipment or would like to propose a tool to be used internally at Fleet, [create an issue](https://github.com/fleetdm/confidential/issues/new?assignees=&labels=%3Ahelp-it&projects=&template=1-custom-request.md&title=) on the 🌐 IT kanban board.
+Fleet provides laptops and software licenses for core team members to use while working at Fleet. If you need new equipment or would like to propose a tool to be used internally at Fleet, [create an issue](https://github.com/fleetdm/confidential/issues/new?assignees=&labels=%3Ahelp-it&projects=&template=1-custom-request.md&title=) on the 🌐 IT kanban board.
 
 
 ### Requesting new equipment

handbook/company/leadership.md

@@ -196,7 +196,6 @@ In addition to [core team members](https://fleetdm.com/handbook/company/leadersh
 
 Consultants:
 - do NOT receive company-issued laptops
-- do NOT receive Yubikeys
 - do NOT get a "Hiring" issue created for them
 - do NOT get a company email address, nor everyone's calendars, nor the shared drive _(with occasional exceptions)_
 - do NOT go through training using the contributor onboarding issue.
@@ -227,7 +226,7 @@ Fleet asks US-based hourly contributors to track hours in Gusto, and contributor
 
 Core team members:
 - are hired for an existing [open position](https://fleetdm.com/handbook/company/leadership#creating-a-new-position)
-- are hired using Fleet's "Hiring" issue template, including receiving a company-issued laptop and Yubikeys
+- are hired using Fleet's "Hiring" issue template, including receiving a company-issued laptop
 - must be onboarded (complete the entire, unabridged onboarding process in Fleet's "Onboarding" issue template)
 - must be offboarded
 - get an email address

handbook/it/README.md

@@ -32,7 +32,7 @@ Domain name registrations are handled through Namecheap. Access is managed via 1
 
 ### Secure company-issued equipment for a team member
 
-As soon as an offer is accepted, Fleet provides laptops and YubiKey security keys for core team members to use while working at Fleet. The IT engineer will work with the new team member to get their equipment requested and shipped to them on time.
+As soon as an offer is accepted, Fleet provides laptops for core team members to use while working at Fleet. The IT engineer will work with the new team member to get their equipment requested and shipped to them on time.
 
 - [**Check the "📦 Warehouse" team in dogfood**](https://dogfood.fleetdm.com/dashboard?team_id=279) before purchasing any equipment including laptops, to ensure we efficiently [utilize existing assets before spending money](https://fleetdm.com/handbook/company/why-this-way#why-spend-less). If Fleet IT warehouse inventory can meet the needs of the request, file a [warehouse request](https://github.com/fleetdm/confidential/issues/new?assignees=sampfluger88&labels=&projects=&template=warehouse-request.md&title=%F0%9F%92%BB+Warehouse+request).
 
@@ -45,8 +45,6 @@ As soon as an offer is accepted, Fleet provides laptops and YubiKey security key
 
  > A 3-year AppleCare+ Protection Plan (APP) should be considered default for Apple computers >$1500. Base MacBook Airs, Mac minis, etc. do not need APP unless configured beyond the $1500 price point. APP provides 24/7 support, and global repair coverage in case of accidental screen damage or liquid spill, and battery service.
 
- - Order a pack of two [YubiKey 5C NFC security keys](https://www.yubico.com/product/yubikey-5-series/yubikey-5c-nfc/) for new team member, shipped to them directly.
-
 - Include delivery tracking information when closing the support request so the new employee can be notified.
 
 
@@ -73,7 +71,7 @@ Upon receiving any device, follow these steps to process incoming equipment.
 Once the department approves inventory to be shipped from Fleet IT, follow these step to ship the equipment.
 1. Compare the equipment request issue with the ["📦 Warehouse" team](https://dogfood.fleetdm.com/settings/teams/users?team_id=279) and verify physical inventory.
 2. Plug in the device and ensure inventory has been correctly processed and all components are present (e.g. charger cord, power converter).
-3. Package equipment for shipment and include Yubikeys (if requested).
+3. Package equipment for shipment.
 4. Change the "host" info to reflect the new user. If you encounter any issues, repeat the [process incoming equipment steps](https://fleetdm.com/handbook/it#process-incoming-equipment).
 6. Ship via FedEx to the address listed in the equipment request.
 7. Add a comment to the equipment request issue, at-mentioning the requestor with the FedEx tracking info and close the issue.