Revert reversion of TensorFlow 2.9 update

With the errors caused by the previous TensorFlow 2.9 update
being fixed, we can proceed with the upgrade.

Signed-off-by: erik.andersson@arm.com <erik.andersson@arm.com>
Change-Id: Ie1f025e8d984efaebc68b8d051126d49bee6b2b8
diff --git a/ethosu/vela/tflite/CumsumOptions.py b/ethosu/vela/tflite/CumsumOptions.py
index 66410f1..33e086e 100644
--- a/ethosu/vela/tflite/CumsumOptions.py
+++ b/ethosu/vela/tflite/CumsumOptions.py
@@ -3,27 +3,17 @@
 # namespace: tflite
 
 import flatbuffers
-from flatbuffers.compat import import_numpy
-np = import_numpy()
 
 class CumsumOptions(object):
     __slots__ = ['_tab']
 
     @classmethod
-    def GetRootAs(cls, buf, offset=0):
+    def GetRootAsCumsumOptions(cls, buf, offset):
         n = flatbuffers.encode.Get(flatbuffers.packer.uoffset, buf, offset)
         x = CumsumOptions()
         x.Init(buf, n + offset)
         return x
 
-    @classmethod
-    def GetRootAsCumsumOptions(cls, buf, offset=0):
-        """This method is deprecated. Please switch to GetRootAs."""
-        return cls.GetRootAs(buf, offset)
-    @classmethod
-    def CumsumOptionsBufferHasIdentifier(cls, buf, offset, size_prefixed=False):
-        return flatbuffers.util.BufferHasIdentifier(buf, offset, b"\x54\x46\x4C\x33", size_prefixed=size_prefixed)
-
     # CumsumOptions
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)
@@ -42,19 +32,7 @@
             return bool(self._tab.Get(flatbuffers.number_types.BoolFlags, o + self._tab.Pos))
         return False
 
-def Start(builder): builder.StartObject(2)
-def CumsumOptionsStart(builder):
-    """This method is deprecated. Please switch to Start."""
-    return Start(builder)
-def AddExclusive(builder, exclusive): builder.PrependBoolSlot(0, exclusive, 0)
-def CumsumOptionsAddExclusive(builder, exclusive):
-    """This method is deprecated. Please switch to AddExclusive."""
-    return AddExclusive(builder, exclusive)
-def AddReverse(builder, reverse): builder.PrependBoolSlot(1, reverse, 0)
-def CumsumOptionsAddReverse(builder, reverse):
-    """This method is deprecated. Please switch to AddReverse."""
-    return AddReverse(builder, reverse)
-def End(builder): return builder.EndObject()
-def CumsumOptionsEnd(builder):
-    """This method is deprecated. Please switch to End."""
-    return End(builder)
\ No newline at end of file
+def CumsumOptionsStart(builder): builder.StartObject(2)
+def CumsumOptionsAddExclusive(builder, exclusive): builder.PrependBoolSlot(0, exclusive, 0)
+def CumsumOptionsAddReverse(builder, reverse): builder.PrependBoolSlot(1, reverse, 0)
+def CumsumOptionsEnd(builder): return builder.EndObject()