Remove DestructuringBindingsForFieldClass

There is now a superior implementation in pystencils_autodiff.

This is actually a AST Node for wrapper code. pystencils_autodiff has now a AST printer for framework integration code. So framework AST nodes are now there and kernel AST nodes remain here.

pystencils/backends/cbackend.py

@@ -15,7 +15,6 @@ from pystencils.fast_approximation import fast_division, fast_inv_sqrt, fast_sqr
 from pystencils.integer_functions import (
     bit_shift_left, bit_shift_right, bitwise_and, bitwise_or, bitwise_xor,
     int_div, int_power_of_2, modulo_ceil)
-from pystencils.kernelparameters import FieldPointerSymbol
 
 try:
     from sympy.printing.ccode import C99CodePrinter as CCodePrinter
@@ -276,24 +275,6 @@ class CBackend:
             result += "else " + false_block
         return result
 
-    def _print_DestructuringBindingsForFieldClass(self, node):
-        # Define all undefined symbols
-        undefined_field_symbols = node.symbols_defined
-        destructuring_bindings = ["%s %s = %s.%s;" %
-                                  (u.dtype,
-                                   u.name,
-                                   u.field_name if hasattr(u, 'field_name') else u.field_names[0],
-                                   node.CLASS_TO_MEMBER_DICT[u.__class__] %
-                                   (() if type(u) == FieldPointerSymbol else (u.coordinate,)))
-                                  for u in undefined_field_symbols
-                                  ]
-        destructuring_bindings.sort()  # only for code aesthetics
-        return "{\n" + self._indent + \
-               ("\n" + self._indent).join(destructuring_bindings) + \
-               "\n" + self._indent + \
-               ("\n" + self._indent).join(self._print(node.body).splitlines()) + \
-               "\n}"
-
 
 # ------------------------------------------ Helper function & classes -------------------------------------------------