Remove np.obj2sctype

Author: Armavica

pytensor/tensor/type.py

@@ -102,7 +102,7 @@ def __init__(
         if str(dtype) == "floatX":
             self.dtype = config.floatX
         else:
-            if np.obj2sctype(dtype) is None:
+            if np.dtype(dtype).type is None:
                 raise TypeError(f"Invalid dtype: {dtype}")
 
             self.dtype = np.dtype(dtype).name
@@ -785,8 +785,7 @@ def tensor(
     if name is not None:
         # Help catching errors with the new tensor API
         # Many single letter strings are valid sctypes
-        if str(name) == "floatX" or (len(str(name)) > 1 and np.obj2sctype(name)):
-            np.obj2sctype(name)
+        if str(name) == "floatX" or (len(str(name)) > 1 and np.dtype(name).type):
             raise ValueError(
                 f"The first and only positional argument of tensor is now `name`. Got {name}.\n"
                 "This name looks like a dtype, which you should pass as a keyword argument only."