Removing NSS files and USE_OPENSSL flag

build/config/crypto.gni

Index: build/config/crypto.gni
diff --git a/build/config/crypto.gni b/build/config/crypto.gni
index 2b15b1c2a549711a0e049c0379d895dda4034dc2..0196e873e506cc946532f6aa54eb8eb8f0eb988a 100644
--- a/build/config/crypto.gni
+++ b/build/config/crypto.gni
@@ -11,10 +11,6 @@
 # required. See the declare_args block of BUILDCONFIG.gn for advice on how
 # to set up feature flags.
 
-declare_args() {
-  use_openssl = true
-}
-
 # True when we're using OpenSSL for representing certificates. When targeting
 # Android, the platform certificate library is used for certificate
 # verification. On NaCl, verification isn't supported. On other targets, this
@@ -22,12 +18,6 @@ declare_args() {
 # is unsupported.
 use_openssl_certs = is_android || is_nacl
 
-# True if NSS is used for certificate handling. Note that this is independent
-# from use_openssl. It is possible to use OpenSSL for the crypto library, but
-# NSS for the platform certificate library.
+# True if NSS is used for certificate handling. It is possible to use OpenSSL
+# for the crypto library, but NSS for the platform certificate library.
 use_nss_certs = is_linux
-
-# True if NSS is used for certificate verification. On non-OpenSSL iOS
-# configurations, certificates use the operating system library, but the
-# verifier uses the bundled copy of NSS.
-use_nss_verifier = use_nss_certs || (is_ios && !use_openssl)