remove unused imports

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

Author: vpipkt

pyrasterframes/src/main/python/pyrasterframes/rf_types.py

@@ -31,7 +31,7 @@ class here provides the PyRasterFrames entry point.
 
 from pyspark.ml.param.shared import HasInputCols
 from pyspark.ml.wrapper import JavaTransformer
-from pyspark.ml.util import JavaMLReadable, JavaMLWritable, DefaultParamsReadable, DefaultParamsWritable
+from pyspark.ml.util import DefaultParamsReadable, DefaultParamsWritable
 
 from pyrasterframes.rf_context import RFContext