Prerender2: Remove flag from UI

Prerender2 is enabled by default now. Remove the flag
from the UI so conditional code can be cleaned up.

BUG=chromium:1391036

Change-Id: Ic3e5a3b5e85c59dc06945d578d718dd53a97e9dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4040446
Commit-Queue: Hiroki Nakagawa <[email protected]>
Auto-Submit: Johann Koenig <[email protected]>
Reviewed-by: Hiroki Nakagawa <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1073906}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 8d16014..2cdd73b 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -2428,11 +2428,6 @@
 const char kBookmarksRefreshDescription[] =
     "Enable various changes to bookmarks.";
 
-const char kPrerender2Name[] = "Prerender2";
-const char kPrerender2Description[] =
-    "Enables the new prerenderer implementation for "
-    "<script type=speculationrules> that specifies prerender candidates.";
-
 const char kOmniboxTriggerForPrerender2Name[] =
     "Omnibox trigger for Prerender2";
 const char kOmniboxTriggerForPrerender2Description[] =
@@ -2442,7 +2437,7 @@
     "Prerender search suggestions";
 const char kSupportSearchSuggestionForPrerender2Description[] =
     "Allows Prerender2 to prerender search suggestions provided by the default "
-    "search engine. Requires chrome://flags/#enable-prerender2 to be enabled";
+    "search engine.";
 
 const char kEnableOmniboxSearchPrefetchName[] = "Omnibox prefetch Search";
 const char kEnableOmniboxSearchPrefetchDescription[] =