remove obsolete warning about flash attention on Vulkan (#1634)

Author: wbruna

koboldcpp.py

@@ -6911,8 +6911,6 @@ def kcpp_main_process(launch_args, g_memory=None, gui_launcher=False):
 
         if not args.blasthreads or args.blasthreads <= 0:
             args.blasthreads = args.threads
-        if args.flashattention and (args.usevulkan is not None) and args.gpulayers!=0:
-            print("\nWARNING: FlashAttention is strongly discouraged when using Vulkan GPU offload as it is extremely slow!\n")
 
         modelname = os.path.abspath(args.model_param)
         print(args)