Revert "[IMP] calendar: enable change recurrence start/stop"
Revert "[IMP] calendar: enable change recurrence start/stop"

This reverts commit 33755f18826b1322283ed95dc045eb009be774ef.

note: revert for now since some scenarios were not taken into account,
detached event could have been moved to another day.

laslabs/odoo,Elico-Corp/odoo_OCB,microcom/odoo,dfang/odoo,storm-computers/odoo,bplancher/odoo,ygol/odoo,bplancher/odoo,microcom/odoo,sysadminmatmoz/OCB,ygol/odoo,ygol/odoo,microcom/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,storm-computers/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,bplancher/odoo,sysadminmatmoz/OCB,dfang/odoo,ygol/odoo,hip-odoo/odoo,stephen144/odoo,sysadminmatmoz/OCB,stephen144/odoo,hip-odoo/odoo,laslabs/odoo,bplancher/odoo,hip-odoo/odoo,storm-computers/odoo,ygol/odoo,sysadminmatmoz/OCB,microcom/odoo,dfang/odoo,microcom/odoo,laslabs/odoo,Elico-Corp/odoo_OCB,hip-odoo/odoo,storm-computers/odoo,dfang/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,bplancher/odoo,bplancher/odoo,stephen144/odoo,Elico-Corp/odoo_OCB,storm-computers/odoo,stephen144/odoo,storm-computers/odoo,ygol/odoo,stephen144/odoo,laslabs/odoo,dfang/odoo,hip-odoo/odoo,stephen144/odoo,laslabs/odoo,dfang/odoo,ygol/odoo,microcom/odoo,sysadminmatmoz/OCB,laslabs/odoo