Remove temporary variable

Now that the errorprone update has been completed.

Bug: 253827323
Test: Presubmits
Change-Id: I139f615552ed6a36232687f3a9d59d33fd5ba0fc

root.bp

diff --git a/root.bp b/root.bp
index ee208a0..7e0c1ed 100644
--- a/root.bp
+++ b/root.bp
@@ -2,12 +2,3 @@
 // subdirs= and optional_subdirs= are obsolete and this file no longer
 // needs a list of the top level directories that may contain Android.bp
 // files.
-
-// TODO(b/253827323) Remove this. A module in internal builds needs to disable a new check,
-// IdentifierName, when errorprone is updated. In order to avoid having the update errorprone
-// in internal first, and then aosp, create this variable that we can fill out in internal in the
-// same topic as the errorprone update, then move the flag out of the variable after the update,
-// then remove the variable.
-disable_identifiername_for_errorprone_update = [
-    "-Xep:IdentifierName:OFF",
-]