Fix bool return in llama_model_load, remove std::ignore use

tests/test-model-load-cancel.cpp

@@ -1,17 +1,16 @@
 #include "llama.h"
 
 #include <cstdlib>
-#include <tuple>
 
 int main(void) {
     llama_backend_init(false);
     auto params = llama_model_params{};
     params.use_mmap = false;
     params.progress_callback = [](float progress, void * ctx){
-        std::ignore = ctx;
+        (void) ctx;
         return progress > 0.50;
     };
-    auto * model = llama_load_model_from_file("../models/7B/ggml-model-f16.gguf", params);
+    auto * model = llama_load_model_from_file("models/7B/ggml-model-f16.gguf", params);
     llama_backend_free();
     return model == nullptr ? EXIT_SUCCESS : EXIT_FAILURE;
 }