Remove unused CRYPT_SetPubKeyDecryptor()

core/fdrm/crypto/fx_crypt.cpp

Index: core/fdrm/crypto/fx_crypt.cpp
diff --git a/core/fdrm/crypto/fx_crypt.cpp b/core/fdrm/crypto/fx_crypt.cpp
index 12b955d93d2cd32a9b4c4e6cf7c10c1fc0e653f1..a8cffbe7dfaab16ed30e15c349f294e7e7022fdb 100644
--- a/core/fdrm/crypto/fx_crypt.cpp
+++ b/core/fdrm/crypto/fx_crypt.cpp
@@ -245,16 +245,6 @@ void CRYPT_MD5Generate(const uint8_t* input,
   CRYPT_MD5Update(&ctx, input, length);
   CRYPT_MD5Finish(&ctx, digest);
 }
-static bool (*g_PubKeyDecryptor)(const uint8_t* pData,
-                                 uint32_t size,
-                                 uint8_t* data_buf,
-                                 uint32_t& data_len) = nullptr;
-void CRYPT_SetPubKeyDecryptor(bool (*func)(const uint8_t* pData,
-                                           uint32_t size,
-                                           uint8_t* data_buf,
-                                           uint32_t& data_len)) {
-  g_PubKeyDecryptor = func;
-}
 #ifdef __cplusplus
 };
 #endif