Remove the remaining bssl::Main wrappers.

We've taken to writing bssl::UniquePtr in full, so it's not buying
us much.

Change-Id: Ia2689366cbb17282c8063608dddcc675518ec0ca
Reviewed-on: https://boringssl-review.googlesource.com/12628
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/crypto/dh/dh_test.cc b/crypto/dh/dh_test.cc
index 9a3d780..99bb945 100644
--- a/crypto/dh/dh_test.cc
+++ b/crypto/dh/dh_test.cc
@@ -68,7 +68,6 @@
 #include <openssl/err.h>
 #include <openssl/mem.h>
 
-namespace bssl {
 
 static bool RunBasicTests();
 static bool RunRFC5114Tests();
@@ -76,7 +75,7 @@
 static bool TestASN1();
 static bool TestRFC3526();
 
-static int Main() {
+int main() {
   CRYPTO_library_init();
 
   if (!RunBasicTests() ||
@@ -568,7 +567,7 @@
     return false;
   }
 
-  ScopedCBB cbb;
+  bssl::ScopedCBB cbb;
   uint8_t *der;
   size_t der_len;
   if (!CBB_init(cbb.get(), 0) ||
@@ -661,9 +660,3 @@
 
   return true;
 }
-
-}  // namespace bssl
-
-int main() {
-  return bssl::Main();
-}