Fixed copying text to clipboard.

Clink was putting the actual Unicode text on the clipboard, and for some
reason was also putting empty ANSI text on the clipboard.  It's correct
to omit the ANSI text and just let Windows automatically convert Unicode
text to ANSI text as needed.

clink/lib/src/rl/rl_commands.cpp

@@ -171,8 +171,7 @@ static void copy_impl(const char* value, int length)
     if (OpenClipboard(nullptr) == FALSE)
         return;
 
-    SetClipboardData(CF_TEXT, nullptr);
-    SetClipboardData(CF_UNICODETEXT, mem);
+    SetClipboardData(CF_UNICODETEXT, mem); // Windows automatically dynamically converts to CF_TEXT as needed.
     CloseClipboard();
 }