diff --git a/src/finn/custom_op/fpgadataflow/convolutioninputgenerator.py b/src/finn/custom_op/fpgadataflow/convolutioninputgenerator.py
index 7e098fd705055047f9987a20628d128fe82fe105..2ef5d350fb972e448b9a3745eb8c98197ab87d94 100644
--- a/src/finn/custom_op/fpgadataflow/convolutioninputgenerator.py
+++ b/src/finn/custom_op/fpgadataflow/convolutioninputgenerator.py
@@ -132,12 +132,6 @@ class ConvolutionInputGenerator(HLSCustomOp):
     def verify_node(self):
         pass
 
-    def bram_estimation(self):
-        pass
-
-    def lut_estimation(self):
-        pass
-
     def get_input_datatype(self):
         """Returns FINN DataType of input."""
         return DataType[self.get_nodeattr("inputDataType")]
diff --git a/src/finn/custom_op/fpgadataflow/streamingdatawidthconverter_batch.py b/src/finn/custom_op/fpgadataflow/streamingdatawidthconverter_batch.py
index 1d9a10804f81f4039316daac2ca74c212cbbce6e..5e4c99aa41216b05f66da8341870269c620c6c40 100644
--- a/src/finn/custom_op/fpgadataflow/streamingdatawidthconverter_batch.py
+++ b/src/finn/custom_op/fpgadataflow/streamingdatawidthconverter_batch.py
@@ -28,6 +28,7 @@
 
 import os
 import numpy as np
+
 try:
     from pyverilator import PyVerilator
 except ModuleNotFoundError:
@@ -209,12 +210,6 @@ class StreamingDataWidthConverter_Batch(HLSCustomOp):
 
         return info_messages
 
-    def bram_estimation(self):
-        pass
-
-    def lut_estimation(self):
-        pass
-
     def global_includes(self):
         self.code_gen_dict["$GLOBALS$"] = ['#include "streamtools.h"']
 
diff --git a/src/finn/custom_op/fpgadataflow/streamingmaxpool_batch.py b/src/finn/custom_op/fpgadataflow/streamingmaxpool_batch.py
index 9b9f7bcead9f0063fa646bb4beb2bc886a9526c7..a7c2d5166b6af41327abcfeaa5cb5ae25fd23856 100644
--- a/src/finn/custom_op/fpgadataflow/streamingmaxpool_batch.py
+++ b/src/finn/custom_op/fpgadataflow/streamingmaxpool_batch.py
@@ -150,12 +150,6 @@ class StreamingMaxPool_Batch(HLSCustomOp):
 
         return info_messages
 
-    def bram_estimation(self):
-        pass
-
-    def lut_estimation(self):
-        pass
-
     def global_includes(self):
         self.code_gen_dict["$GLOBALS$"] = ['#include "maxpool.h"']