cmake : fix Metal build (close #1791)

CMakeLists.txt

@@ -218,9 +218,6 @@ if (LLAMA_METAL)
 
     # copy ggml-metal.metal to bin directory
     configure_file(ggml-metal.metal bin/ggml-metal.metal COPYONLY)
-    if (LLAMA_METAL)
-        set_target_properties(llama PROPERTIES RESOURCE "${CMAKE_CURRENT_SOURCE_DIR}/ggml-metal.metal")
-    endif()
 
     set(LLAMA_EXTRA_LIBS ${LLAMA_EXTRA_LIBS}
         ${FOUNDATION_LIBRARY}