remove LogException( ) which is never used

src/util.cpp

@@ -885,12 +885,6 @@ static std::string FormatException(std::exception* pex, const char* pszThread)
             "UNKNOWN EXCEPTION       \n%s in %s       \n", pszModule, pszThread);
 }
 
-void LogException(std::exception* pex, const char* pszThread)
-{
-    std::string message = FormatException(pex, pszThread);
-    LogPrintf("\n%s", message);
-}
-
 void PrintExceptionContinue(std::exception* pex, const char* pszThread)
 {
     std::string message = FormatException(pex, pszThread);

src/util.h

@@ -151,8 +151,6 @@ static inline bool error(const char* format)
     return false;
 }
 
-
-void LogException(std::exception* pex, const char* pszThread);
 void PrintExceptionContinue(std::exception* pex, const char* pszThread);
 std::string FormatMoney(int64_t n, bool fPlus=false);
 bool ParseMoney(const std::string& str, int64_t& nRet);