Fixed all unused-variable Clang warnings on Windows.

net/proxy/dhcp_proxy_script_fetcher_win.cc

Index: net/proxy/dhcp_proxy_script_fetcher_win.cc
diff --git a/net/proxy/dhcp_proxy_script_fetcher_win.cc b/net/proxy/dhcp_proxy_script_fetcher_win.cc
index b777da572aef1b4745611e6a58044ddbccadf111..bf3e9d65836de478749a1beaf1ab036c10f065e7 100644
--- a/net/proxy/dhcp_proxy_script_fetcher_win.cc
+++ b/net/proxy/dhcp_proxy_script_fetcher_win.cc
@@ -43,14 +43,6 @@ const int kMaxDhcpLookupThreads = 12;
 // adapter finishes first.
 const int kMaxWaitAfterFirstResultMs = 400;
 
-const int kGetAdaptersAddressesErrors[] = {
-  ERROR_ADDRESS_NOT_ASSOCIATED,
-  ERROR_BUFFER_OVERFLOW,
-  ERROR_INVALID_PARAMETER,
-  ERROR_NOT_ENOUGH_MEMORY,
-  ERROR_NO_DATA,
-};
-
 }  // namespace
 
 namespace net {