Revert "fix: align numpy dtype overload signature with numpy API"

This reverts commit af57423.

Author: cpcloud

numba_cuda/numba/cuda/np/npyimpl.py

@@ -1017,15 +1017,13 @@ def codegen(context, builder, signature, args):
 
 
 @overload(np.dtype)
-def numpy_dtype(dtype, align=False, copy=False, **kwargs):
+def numpy_dtype(desc):
     """Provide an implementation so that numpy.dtype function can be lowered."""
-    if isinstance(dtype, (types.Literal, types.functions.NumberClass)):
+    if isinstance(desc, (types.Literal, types.functions.NumberClass)):
 
-        def imp(dtype, align=False, copy=False, **kwargs):
-            return _make_dtype_object(dtype)
+        def imp(desc):
+            return _make_dtype_object(desc)
 
         return imp
     else:
-        raise errors.NumbaTypeError(
-            "unknown dtype descriptor: {}".format(dtype)
-        )
+        raise errors.NumbaTypeError("unknown dtype descriptor: {}".format(desc))