Remove implicit cast from CFX_ByteString to (const char*).

core/fxcrt/include/fx_string.h

Index: core/fxcrt/include/fx_string.h
diff --git a/core/fxcrt/include/fx_string.h b/core/fxcrt/include/fx_string.h
index ef0dfee6fb9b100e440bef0080cbb0e211a60c0a..4b73551573f43edca7d0cdd1e6b962015b10aaac 100644
--- a/core/fxcrt/include/fx_string.h
+++ b/core/fxcrt/include/fx_string.h
@@ -170,9 +170,6 @@ class CFX_ByteString {
   // Note: Any subsequent modification of |this| will invalidate the result.
   const FX_CHAR* c_str() const { return m_pData ? m_pData->m_String : ""; }
 
-  // Implicit conversion to C-style string -- deprecated.
-  operator const FX_CHAR*() const { return m_pData ? m_pData->m_String : ""; }
-
   // Explicit conversion to uint8_t*.
   // Note: Any subsequent modification of |this| will invalidate the result.
   const uint8_t* raw_str() const {