Ignore None to Subprocess_Commands (#2680)

Ignores none params when building the subprocess_command for vllm. As none values stop vllm from deploying properly, as --quantize will be passed with none if quantization type isn't specified in the model name.

unsloth/dataprep/synthetic.py

@@ -97,6 +97,9 @@ class SyntheticDataKit:
             elif which == "False":
                 # Ignore flag
                 pass
+            elif which == "None":
+                # Ignore flag
+                pass
             else:
                 subprocess_commands += ["--" + flag, which,]
         pass