remove old source documentation

README.md

@@ -243,51 +243,6 @@ There are shortcuts for producing a new empty TSFrame that might be useful if yo
 	SeriesBuffer(offset=16384, offset_end=32768, shape=(2048,), sample_rate=2048, duration=1000000000, data=None)
 ```
 
-## Example
+### Writing a new source element
+
 
-This [MR](https://git.ligo.org/greg/sgn-ts/-/merge_requests/46) is pending but would make this example simpler
-```python
-#!/usr/bin/env python3
-
-from dataclasses import dataclass
-import numpy
-from sgn import Pipeline, NullSink
-from sgnts.base import Offset, SeriesBuffer, TSFrame, TSSource, TSSlice, TSSlices
-import time
-
-@dataclass
-class SineSource(TSSource):
-    frequency: float = 32
-    rate: int = 2048
-
-    def __post_init__(self):
-        super().__post_init__()
-        # FIXME turn these into a helper method
-        self.num_samples = Offset.sample_stride(self.rate)
-        self.shape = (self.num_samples,)
-
-    def new(self, pad):
-        time.sleep(1)
-        # FIXME turn these into a helper method        
-        buf = SeriesBuffer(offset=self.offset[pad], sample_rate=self.rate, data=0, shape=self.shape)
-        tarr = numpy.arange(self.num_samples) / buf.sample_rate + buf.t0
-        self.offset[pad] += Offset.fromsamples(self.num_samples, self.rate)
-        frame = TSFrame(buffers=[buf])
-
-        buf.data[:] = numpy.sin(2 * numpy.pi * self.frequency * tarr)
-        return frame
-
-# FIXME don't require names
-src = SineSource(name="sine", source_pad_names = ["H1"], frequency=32, rate=2048)
-sink = NullSink(name="fakesink", sink_pad_names = ["H1"])
-
-# Create the Pipeline
-p = Pipeline()
-
-# FIXME simplify linking
-p.insert(
-    src,
-    sink,
-    link_map={"fakesink:sink:H1": "sine:src:H1"},
-)
-```