Remove NSSCryptoModuleDelegate.

crypto/nss_crypto_module_delegate.h

Index: crypto/nss_crypto_module_delegate.h
diff --git a/crypto/nss_crypto_module_delegate.h b/crypto/nss_crypto_module_delegate.h
index cf08f2859ffb547696638b1508d899290652f9ba..05be77d69a5166e10360df77e5d564c9205e83e5 100644
--- a/crypto/nss_crypto_module_delegate.h
+++ b/crypto/nss_crypto_module_delegate.h
@@ -7,9 +7,6 @@
 
 #include <string>
 
-#include "base/callback_forward.h"
-#include "crypto/scoped_nss_types.h"
-
 namespace crypto {
 
 // PK11_SetPasswordFunc is a global setting.  An implementation of
@@ -37,16 +34,6 @@ class CryptoModuleBlockingPasswordDelegate {
                                       bool* cancelled) = 0;
 };
 
-// Extends CryptoModuleBlockingPasswordDelegate with the ability to return a
-// slot in which to act. (Eg, which slot to store a generated key in.)
-class NSSCryptoModuleDelegate : public CryptoModuleBlockingPasswordDelegate {
- public:
-  ~NSSCryptoModuleDelegate() override {}
-
-  // Get the slot to store the generated key.
-  virtual ScopedPK11Slot RequestSlot() = 0;
-};
-
 }  // namespace crypto
 
 #endif  // CRYPTO_NSS_CRYPTO_MODULE_DELEGATE_H_