Revert "LPS-35938"

This reverts commit 3d23b94696f636cb3f6ccac255af5f89d00275eb.
LPS-35713 Add portlet related information to the manifest
LPS-35722 Add a method to get the portlets from the manifest in the import process
LPS-35683 Use elementHandler for export date
LPS-35683 Move the getPortlets logic to the manifest
LPS-35832 Modifying the import to dinamically render the UI from to the manifest
LPS-35832 Source formatting
LPS-35683 Rearrange the import strategy options
LPS-35683 Define the import strategy in a separate step
LPS-35683 Add back button to import LAR view
LPS-35683 source formatting - when importing, by default everything which comes in the LAR is checked. For the configuration of portlets, some of them may not have a datahandler.
LPS-35683 SF