Simplify Numba implementation of Alloc

Author: ricardoV94

pytensor/link/numba/dispatch/tensor_basic.py

@@ -68,7 +68,7 @@ def numba_funcify_Alloc(op, node, **kwargs):
     shape_var_item_names = [f"{name}_item" for name in shape_var_names]
     shapes_to_items_src = indent(
         "\n".join(
-            f"{item_name} = to_scalar({shape_name})"
+            f"{item_name} = {shape_name}.item()"
             for item_name, shape_name in zip(
                 shape_var_item_names, shape_var_names, strict=True
             )
@@ -86,12 +86,11 @@ def numba_funcify_Alloc(op, node, **kwargs):
 
     alloc_def_src = f"""
 def alloc(val, {", ".join(shape_var_names)}):
-    val_np = np.asarray(val)
 {shapes_to_items_src}
     scalar_shape = {create_tuple_string(shape_var_item_names)}
 {check_runtime_broadcast_src}
-    res = np.empty(scalar_shape, dtype=val_np.dtype)
-    res[...] = val_np
+    res = np.empty(scalar_shape, dtype=val.dtype)
+    res[...] = val
     return res
     """
     alloc_fn = compile_function_src(alloc_def_src, "alloc", {**globals(), **global_env})