MLBEDSW-5102 Update removal of memory only operators

Memory only operators such as Reshape, Squeeze and ExpandDims are
removed in the graph optimiser step.

- Added semantic check that memory only operators have same
  quantisation parameters on ifm/ofm.
- Added support for the ExpandDims operator.
- Addition and cleanup of related unit tests.
- Removed TOSA from the generated SUPPORTED_OPS.md documentation.

Signed-off-by: Jonas Ohlsson <jonas.ohlsson@arm.com>
Change-Id: If848d8afc58c18806e10997ed94e4dae83f30879
diff --git a/ethosu/vela/graph_optimiser.py b/ethosu/vela/graph_optimiser.py
index 87e3bc8..0f5636e 100644
--- a/ethosu/vela/graph_optimiser.py
+++ b/ethosu/vela/graph_optimiser.py
@@ -17,7 +17,7 @@
 # Early optimisation of the network graph, using the rewrite_graph module to do the traversal of the graph.
 from . import rewrite_graph
 from .graph_optimiser_util import check_format_restrictions
-from .graph_optimiser_util import check_reshapes
+from .graph_optimiser_util import check_memory_only_removed
 from .graph_optimiser_util import record_optimised
 from .nn_graph import NetworkType
 from .tflite_graph_optimiser import tflite_optimise_graph
@@ -38,7 +38,7 @@
     # Post-optimisation operator debug tracing, and checking that no undesired reshapes are left in the graph
     for sg in nng.subgraphs:
         rewrite_graph.visit_graph_post_order(
-            sg.output_tensors, arch, [check_format_restrictions], [check_reshapes, record_optimised]
+            sg.output_tensors, arch, [check_format_restrictions], [check_memory_only_removed, record_optimised]
         )
 
     if verbose_graph: