Revert "Swagger closure for Azure Migration Hub Operations" (#4482)

* Revert "Add maximum chunk size to data lake store docs. (#4464)"

This reverts commit ab9c6ff.

* Revert "Add latest authorization tag to java config (#4406)"

This reverts commit 7f0fd16.

* Revert "Mdb 20181029 statepropdescriptions (#4452)"

This reverts commit 90db24c.

* Revert "fixing invalid location in examples (#4415)"

This reverts commit ffaf595.

* Revert "/identity endpoint added (#4460)"

This reverts commit 4f93dee.

* Revert "Added missing PATCH operation to Api Issue resource (#4440)"

This reverts commit 7df0ce5.

* Revert "Adds storage account quick failover API (#4457)"

This reverts commit 10ec74f.

* Revert "DataFactory: add table name in dataset (#4424)"

This reverts commit f8465de.

* Revert "Update README.md (#4421)"

This reverts commit fa6a584.

* Revert "Move Ruby SDK config to its own config file (#4451)"

This reverts commit 2ca50c8.

* Revert "[CognitiveServices] enable Bing Search/CustomSearch products to specify Endpoint (#4401)"

This reverts commit dc782b3.

* Revert "Add GeoRegion property to DeletedSite model (#4448)"

This reverts commit a079367.

* Revert "  Azure Container Instance: Add start container group API (#4423)"

This reverts commit 2ea3e9e.

* Revert "add guidance for example names (#4432)"

This reverts commit 6780e8a.

* Revert "Remove security contact phone field mandatory fields (#4417)"

This reverts commit eaf464e.

* Revert "Add Allowed Connections REST API (#4106)"

This reverts commit 2389da3.

* Revert "Make NIC VM readOnly (#4444)"

This reverts commit 2d83450.

* Revert "Remove readonly attribute from identities collection in users (#4442)"

This reverts commit 7577df9.

* Revert "Add spec for alert repair/remediate (#4084)"

This reverts commit 3f568b4.

* Revert "Py conf in its own file (#4439)"

This reverts commit 3373760.

* Revert "Split Python conf in it's own file (#4438)"

This reverts commit 77cf607.

* Revert "Adding ManagedInstanceVulnerabilityAssessments and ServerVulnerabilityAssessments (#4416)"

This reverts commit dec7549.

* Revert "WebApps: Snapshots API for DR stamps (#4291)"

This reverts commit 916ff2e.

* Revert "Swagger closure for Azure Migration Hub Operations (#4330)"

This reverts commit badd1de.