Arm backend: Remove node vistor for full (pytorch#9904)

The full operator is now decomposed via the ComputeConstantOpsAOT pass

Author: gggekov

backends/arm/operators/__init__.py

@@ -21,7 +21,6 @@
     op_eq,
     op_erf,
     op_exp,
-    op_full,
     op_ge,
     op_get_item,
     op_gt,