Remove unused functions and variables

Signed-off-by: Chris Burel <burelc@amazon.com>

Code/Legacy/CrySystem/DebugCallStack.cpp

@@ -47,8 +47,6 @@ extern HMODULE gDLLHandle;
 static HWND hwndException = 0;
 static bool g_bUserDialog = true;         // true=on crash show dialog box, false=supress user interaction
 
-static int  PrintException(EXCEPTION_POINTERS* pex);
-
 static bool IsFloatingPointException(EXCEPTION_POINTERS* pex);
 
 extern LONG WINAPI CryEngineExceptionFilterWER(struct _EXCEPTION_POINTERS* pExceptionPointers);
@@ -667,8 +665,6 @@ INT_PTR CALLBACK DebugCallStack::ExceptionDialogProc(HWND hwndDlg, UINT message,
 {
     static EXCEPTION_POINTERS* pex;
 
-    static char errorString[32768] = "";
-
     switch (message)
     {
     case WM_INITDIALOG: