MLBEDSW-3772 Reshape removal

-Removed reshapes in the original graph
-Removed the addition of reshapes to the
 optimized graph

-Reshapes with different ifm/ofm quantisation will remain

Signed-off-by: Patrik Gustavsson <patrik.gustavsson@arm.com>
Change-Id: I94862be53dac0d7434815e2aee5ca678228495f8
diff --git a/ethosu/vela/shape4d.py b/ethosu/vela/shape4d.py
index a1b4fea..8981e20 100644
--- a/ethosu/vela/shape4d.py
+++ b/ethosu/vela/shape4d.py
@@ -75,3 +75,6 @@
 
     def as_list(self):
         return list(self._shape4D)
+
+    def get_hw_as_list(self):
+        return list([self.height, self.width])