Revert "708 Implement ReadFileRecordRequest.get_response_pdu_size() to ensure complete record (#709)"

This reverts commit 5f2cf59.

Author: janiversen

pymodbus/file_message.py

@@ -92,7 +92,6 @@ def __init__(self, records=None, **kwargs):
         """
         ModbusRequest.__init__(self, **kwargs)
         self.records = records or []
-        self.count = 0
 
     def encode(self):
         """Encode the request packet.
@@ -139,19 +138,6 @@ def execute(self, context):  # NOSONAR pylint: disable=unused-argument,no-self-u
         files = []
         return ReadFileRecordResponse(files)
 
-    def get_response_pdu_size(self):
-        """Get response pdu size.
-
-        Func_code (1 byte) + Response Byte Count(1 byte) +
-            N * (File Response Byte Count (1 byte) + Reference Type (1 byte) + 2 * registers to read for file record)
-            where N = record sub-request count.
-        """
-        self.count = 0
-        for record in self.records:
-            self.count += record.record_length * 2 + 2 if record.record_length else 0
-
-        return 2 + self.count
-
 
 class ReadFileRecordResponse(ModbusResponse):
     """Read file record response.