--- dyld/dyld-1241.17/mach_o/Error.cpp
+++ dyld/dyld-1122.1/mach_o/Error.cpp
@@ -51,14 +51,6 @@
     _buffer = other._buffer;
     other._buffer = nullptr;
     return *this;
-}
-
-
-Error Error::copy(const Error& other)
-{
-    if ( other.noError() )
-        return Error::none();
-    return Error("%s", other.message());
 }
 
 Error::~Error()
@@ -117,23 +109,4 @@
 #endif
 }
 
-void Error::append(const char* format, ...)
-{
-#if TARGET_OS_EXCLAVEKIT
-   size_t len = strlen(_strBuf);
-   va_list list;
-   va_start(list, format);
-   vsnprintf(&_strBuf[len], sizeof(_strBuf)-len, format, list);
-   va_end(list);
-#else
-    assert(_buffer != nullptr);
-    _simple_sresize(_buffer);   // move insertion point to end of existing string in buffer
-    va_list list;
-    va_start(list, format);
-    _simple_vsprintf(_buffer, format, list);
-    va_end(list);
-#endif
-}
-
-
 } // namespace mach_o