vulkan: Remove debug comments

Author: makaveli10

ggml/src/ggml-vulkan/ggml-vulkan.cpp

@@ -9382,9 +9382,6 @@ static bool ggml_vk_build_graph(ggml_backend_vk_context * ctx, ggml_cgraph * cgr
         break;
 
     case GGML_OP_CROSS_ENTROPY_LOSS_BACK:
-        // std::cerr << "*** GGML_VK_BUILD_GRAPH: CROSS_ENTROPY_LOSS_BACK case hit, calling ggml_vk_cross_entropy_loss_back" << std::endl;
-        // std::cout << "*** GGML_VK_BUILD_GRAPH: CROSS_ENTROPY_LOSS_BACK case hit, calling ggml_vk_cross_entropy_loss_back" << std::endl;
-        // fflush(stdout); fflush(stderr);
         ggml_vk_cross_entropy_loss_back(ctx, compute_ctx, src0, src1, src2, node, dryrun);
 
         break;