remove kernel_attr (inline transform is now smart enough to autodetect)

artiq/coredevice/dds.py

@@ -23,8 +23,6 @@ class DDS(AutoContext):
         self.previous_frequency = 0*MHz
         self.sw = rtio.RTIOOut(self, channel=self.rtio_switch)
 
-    kernel_attr = "previous_frequency"
-
     @portable
     def frequency_to_ftw(self, frequency):
         """Returns the frequency tuning word corresponding to the given

artiq/coredevice/rtio.py

@@ -18,8 +18,6 @@ class LLRTIOOut(AutoContext):
         self.previous_timestamp = int64(0)  # in RTIO cycles
         self._set_oe()
 
-    kernel_attr = "previous_timestamp"
-
     @kernel
     def _set_oe(self):
         syscall("rtio_oe", self.channel, 1)
@@ -62,8 +60,6 @@ class _RTIOBase(AutoContext):
         self.previous_timestamp = int64(0)  # in RTIO cycles
         self.previous_value = 0
 
-    kernel_attr = "previous_timestamp previous_value"
-
     @kernel
     def _set_oe(self, oe):
         syscall("rtio_oe", self.channel, oe)

artiq/devices/pdq2/__init__.py

@@ -123,8 +123,6 @@ class CompoundPDQ2(AutoContext):
         self.current_frame = -1
         self.next_sn = -1
 
-    kernel_attr = "current_frame next_sn"
-
     def create_frame(self):
         return _Frame(self.core)