Remove file:// scheme from docs geotiff write

Signed-off-by: Jason T. Brown <[email protected]>

Author: vpipkt

pyrasterframes/src/main/python/docs/raster-write.pymd

@@ -66,7 +66,7 @@ Fortunately, we can use the cluster computing capability to downsample the data
 
 ```python write_geotiff
 outfile = os.path.join('/tmp', 'geotiff-overview.tif')
-spark_df.write.geotiff('file://' + outfile, crs='EPSG:4326', raster_dimensions=(256, 256))
+spark_df.write.geotiff(outfile, crs='EPSG:4326', raster_dimensions=(256, 256))
 ```
 
 View it with `rasterio` to check the results:
@@ -83,6 +83,10 @@ with rasterio.open(outfile) as src:
 
 If there are many tile or projected raster columns in the DataFrame, the GeoTIFF writer will write each one as a separate band in the file. Each band in the output will be tagged the input column names for reference.
 
+```python, echo=False
+os.remove(outfile)
+```
+
 ## GeoTrellis Layers
 
 [GeoTrellis][GeoTrellis] is one of the key libraries that RasterFrames builds upon. It provides a Scala language API to working with large raster data with Apache Spark. Ingesting raster data into a Layer is one of the key concepts for creating a dataset for processing on Spark. RasterFrames write data from an appropriate DataFrame into a [GeoTrellis Layer](https://geotrellis.readthedocs.io/en/latest/guide/tile-backends.html). RasterFrames provides a `geotrellis` DataSource that supports both reading and writing of GeoTrellis layers.