Remove the Tbr footer and the TBR glossary entry

TBR is no longer supported for Chromium changes, so drop Tbr: from the
CL footer reference and TBR from the ChromiumOS glossary, whose entry
also linked to a section of code_reviews.md that no longer exists.

Bug: 40767138
Change-Id: Ied7cc3c89cbf356074b2953b30d95d422de32f00
Reviewed-on: https://chromium-review.googlesource.com/c/website/+/8570100
Reviewed-by: James Hawkins <jhawkins@chromium.org>
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Reviewed-by: Jesse McKenna <jessemckenna@google.com>
diff --git a/site/chromium-os/developer-library/glossary/index.md b/site/chromium-os/developer-library/glossary/index.md
index 0c6e0a8..a66f601 100644
--- a/site/chromium-os/developer-library/glossary/index.md
+++ b/site/chromium-os/developer-library/glossary/index.md
@@ -113,9 +113,6 @@
 *   __SW WP__: Software Write Protect.
 *   __Servo__: a debugging board that connects via USB to a host
     machine and a device under test.
-*   __TBR__: "To be reviewed". In
-    [specific circumstances](https://chromium.googlesource.com/chromium/src/+/HEAD/docs/code_reviews.md#TBR-To-Be-Reviewed)
-    used to land code and have it reviewed later.
 *   __TCPC__: Type C Port Controller.
 *   __TPM__: ["Trusted Platform Module"](https://en.wikipedia.org/wiki/Trusted_Platform_Module),
     Tamper-resistant chip that the CPU can talk to. Securely stores
diff --git a/site/developers/contributing-code/-bug-syntax/index.md b/site/developers/contributing-code/-bug-syntax/index.md
index 06bf052..490298b 100644
--- a/site/developers/contributing-code/-bug-syntax/index.md
+++ b/site/developers/contributing-code/-bug-syntax/index.md
@@ -38,12 +38,6 @@
 bar@example.com). This field will be going away with the switch to Gerrit, use
 the "-r foo@example.com" command line option to "git cl upload" instead.
 
-**Tbr:**
-
-Same format as the R line, but indicates to the commit queue that it can skip
-checking that all files in the change have been approved by their respective
-OWNERS.
-
 **Cq-Include-Trybots:**
 
 A comma-separated list of trybots which should be triggered and checked by the