Remove LoFi comment

TBR=ryansturm@chromium.org

Bug: 944286
Change-Id: Iececdaa2f3e10ac558bafdfe57ed041753f097c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1677549Reviewed-by: Robert Ogden <robertogden@chromium.org>
Commit-Queue: Robert Ogden <robertogden@chromium.org>
Auto-Submit: Robert Ogden <robertogden@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672513}

chrome/browser/chrome_content_browser_client.cc

@@ -5560,7 +5560,7 @@ ChromeContentBrowserClient::DetermineAllowedPreviewsWithoutHoldback(
     }
   }
 
-  // Evaluate client LoFi, Offline, NoScript, and ResourceBlocking previews.
+  // Evaluate Offline, NoScript, and ResourceBlocking previews.
   previews_state |= previews::DetermineAllowedClientPreviewsState(
       previews_data, previews_triggering_logic_already_ran,
       data_reduction_proxy_settings->IsDataReductionProxyEnabled(),