Remove unused helper file

pytensor/link/numba/dispatch/helpers.py

-from numba import njit, types
-from numba.core import cgutils
-from numba.extending import intrinsic
-
-
-def tuple_mapper(item_map_func):
-    @intrinsic
-    def map_tuple(typingctx, *input_tuples):
-        signatures = [
-            typingctx.resolve_function_type(item_map_func, args, {})
-            for args in zip(*[in_type.types for in_type in input_tuples], strict=True)
-        ]
-
-        output_type = types.Tuple([sig.return_type for sig in signatures])
-        signature = output_type(types.StarArgTuple(input_tuples))
-
-        def codegen(context, builder, signature, args):
-            (input_tuples,) = args
-            input_values = []
-            for val in cgutils.unpack_tuple(builder, input_tuples):
-                input_values.append(cgutils.unpack_tuple(builder, val))
-
-            mapped_values = []
-            for values, sig in zip(zip(*input_values), signatures, strict=True):
-                func = context.compile_subroutine(builder, item_map_func, sig)
-                output = context.call_internal(builder, func.fndesc, sig, values)
-                mapped_values.append(output)
-
-            return context.make_tuple(builder, output_type, mapped_values)
-
-        return signature, codegen
-
-    return map_tuple
-
-
-@njit
-def check_broadcasting(array, bcs, shape):
-    assert array.ndim == len(shape)
-    for bc, array_length, length in zip(bcs, array.shape, shape):
-        if bc:
-            assert array_length == 1
-        else:
-            assert array_length == length