minor : fix compile warnings

ggml-ci

examples/export-lora/export-lora.cpp

@@ -7,8 +7,6 @@
 #include <string>
 #include <thread>
 
-static const size_t tensor_alignment = 32;
-
 struct lora_info {
     std::string filename;
     float scale;

ggml.c

@@ -2086,6 +2086,7 @@ void ggml_numa_init(enum ggml_numa_strategy numa_flag) {
         }
     }
 #else
+    GGML_UNUSED(numa_flag);
     // TODO
 #endif
 }