Cleanup get_call_data

mythril/laser/ethereum/call.py

@@ -179,29 +179,23 @@ def get_call_data(
         else memory_size
     )
 
-    try:
-        uses_entire_calldata = False
-        try:
     uses_entire_calldata = simplify(
         memory_size - global_state.environment.calldata.calldatasize == 0
     )
-        except Z3Exception:
-            pass
 
-        if uses_entire_calldata:
+    if uses_entire_calldata == True:
-            call_data = global_state.environment.calldata
+        return global_state.environment.calldata
-        else:
+
+    try:
         calldata_from_mem = state.memory[
             util.get_concrete_int(memory_start) : util.get_concrete_int(
                 memory_start + memory_size
             )
         ]
-            call_data = ConcreteCalldata(transaction_id, calldata_from_mem)
+        return ConcreteCalldata(transaction_id, calldata_from_mem)
     except TypeError:
         log.debug("Unsupported symbolic calldata offset")
-        call_data = SymbolicCalldata(transaction_id)
+        return SymbolicCalldata(transaction_id)
-
-    return call_data
 
 
 def native_call(