DRP: Make secure proxy check URL a DRP param

chrome/browser/flag_descriptions.cc

Index: chrome/browser/flag_descriptions.cc
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 672ffc3911a5facbeda3e9061aeb61a16d0d4100..42a7dd627c5f4e178cdf69a961c8991aa6853945 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -117,11 +117,6 @@ const char kCrossProcessGuestViewIsolationDescription[] =
     "Highly experimental where guests such as <webview> are implemented on "
     "the out-of-process iframe infrastructure.";
 
-const char kDataReductionProxyCarrierTestName[] =
-    "Enable a carrier-specific Data Reduction Proxy for testing.";
-const char kDataReductionProxyCarrierTestDescription[] =
-    "Use a carrier-specific Data Reduction Proxy for testing.";
-
 const char kDataReductionProxyLoFiName[] = "Data Saver Lo-Fi mode";
 const char kDataReductionProxyLoFiDescription[] =
     "Forces Data Saver Lo-Fi mode to be always enabled, enabled only on "