Remove deprecated c&py

theano/compile/mode.py

@@ -68,7 +68,6 @@ predefined_linkers = {
     'c': gof.CLinker(),  # Don't support gc. so don't check allow_gc
     'c|py': gof.OpWiseCLinker(),  # Use allow_gc Theano flag
     'c|py_nogc': gof.OpWiseCLinker(allow_gc=False),
-    'c&py': gof.DualLinker(checker=check_equal),  # Deprecated
     'vm': gof.vm.VM_Linker(use_cloop=False),  # Use allow_gc Theano flag
     'cvm': gof.vm.VM_Linker(use_cloop=True),  # Use allow_gc Theano flag
     'vm_nogc': gof.vm.VM_Linker(allow_gc=False, use_cloop=False),
@@ -394,9 +393,6 @@ def get_mode(orig_string):
 def get_default_mode():
     return get_mode(None)
 
-# Removed: use config.mode instead.
-#default_mode = config.mode
-
 
 def register_mode(name, mode):
     """Add a `Mode` which can be referred to by `name` in `function`."""

theano/configdefaults.py

@@ -172,8 +172,8 @@ if rc == 0 and config.cxx != "":
     AddConfigVar('linker',
                  ("Default linker used if the theano flags mode is Mode "
                   "or ProfileMode(deprecated)"),
-                 EnumStr('cvm', 'c|py', 'py', 'c', 'c|py_nogc', 'c&py',
-                     'vm', 'vm_nogc', 'cvm_nogc'),
+                 EnumStr('cvm', 'c|py', 'py', 'c', 'c|py_nogc',
+                         'vm', 'vm_nogc', 'cvm_nogc'),
                  in_c_key=False)
 else:
     # g++ is not present or the user disabled it,

theano/gof/cc.py

@@ -1737,8 +1737,6 @@ class DualLinker(link.Linker):
             no_recycling = []
         if self.fgraph is not None and self.fgraph is not fgraph:
             return type(self)(self.checker).accept(fgraph, no_recycling)
-            # raise Exception("Cannot accept from a Linker that is already "
-            #                 "tied to another FunctionGraph.")
         self.fgraph = fgraph
         self.no_recycling = no_recycling
         return self