metal : remove unnecessary nil check (#4986)

diff --git a/ggml-metal.m b/ggml-metal.m
index a549e6713e9bcb9c5d718311c7096f0975585885..8bb4edd64db2e6afb05cb61e0f8c1a37a267e172 100644 (file)
--- a/ggml-metal.m
+++ b/ggml-metal.m
@@ -2236,10 +2236,7 @@ static bool ggml_metal_graph_compute(
 #endif
         }
 
-        if (encoder != nil) {
-            [encoder endEncoding];
-            encoder = nil;
-        }
+        [encoder endEncoding];
 
         [command_buffer commit];
     });