Do not use ctor

* Reduce line of codes.
* We can use virtual function for Maker now.
* The implementation does not care what maker holds, it is easier to
refactor later.

Add the call of DropKids at the end of executor.Run to delete the local scopes created in operators (#10403)

* Add the call of DeleteScope to delete the memory of scope created by NewScope.

* Call DropKids at the end of executor.Run to delete all local scopes created in operators.

* fix remove op

* update

* Fix the bug when a input variable of op is dispensable.

* Add HasInputs/Outputs interfaces to OperatorBase.

* Remove the unreferenced header file.

* delete unused IsNetOp() and Rename()

* rm OperatorBase::Rename implementation

* delete Operator::InputVars()

* remove unused OperatorBase::ShareLoD; ShareLoD has been implemented in infershape

* organize operatorbase; remove unused set_type

* add comments

* fix comment

* Fic CPPLint issues with data_transform

* Fic CPPLint issues with prune.cc

* Fix CPPLint issues in init

* Fix compilation

* Fix typo in init.cc

* Fix CPPLint issues in library_type.h

* Fix compilation in init.h

* Fix CPPLint issues with data_type.h

* Fix CPPLint issues with feed_fetch_type.h