fix(datasource mongo): remove useless version manager #6434

Job	Run time
Installing & Building	1m 39s
Lint commit messages	15s
Build API Reference	54s
Linting & Testing (agent)	1m 5s
Linting & Testing (forest-cloud)	49s
Linting & Testing (datasource-customizer)	59s
Linting & Testing (datasource-dummy)	28s
Linting & Testing (datasource-mongoose)	1m 23s
Linting & Testing (datasource-replica)	43s
Linting & Testing (datasource-mongo)	1m 7s
Linting & Testing (datasource-sequelize)	1m 6s
Linting & Testing (datasource-sql)	3m 0s
Linting & Testing (datasource-toolkit)	41s
Linting & Testing (forestadmin-client)	44s
Linting & Testing (plugin-aws-s3)	28s
Linting & Testing (plugin-export-advanced)	30s
Linting & Testing (plugin-flattener)	29s
Send Coverage	14s
Publish API Reference	0s
Release packages	0s
	16m 34s

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