metal : remove NW template argument

ggml-ci

Author: ggerganov

ggml/src/ggml-metal/ggml-metal-device.cpp

@@ -989,7 +989,7 @@ ggml_metal_pipeline_t ggml_metal_library_get_pipeline_flash_attn_ext_vec(
             dk,
             dv);
 
-    snprintf(name, 256, "%s%d_mask=%d_sink=%d_bias=%d_softcap=%d_ns10=%d_ns20=%d_nsg=%d_nwg=%d",
+    snprintf(name, 256, "%s_mask=%d_sink=%d_bias=%d_softcap=%d_ns10=%d_ns20=%d_nsg=%d_nwg=%d",
             base,
             has_mask,
             has_sinks,