Revert "Update settings_headers.xml"

This reverts commit 1115b697e6142df269bc1e3de0307c16ffb725c7.
Revert "add OTA (3/3)"

This reverts commit 3a21dc1a0270a3390a1b0ff10d962a78c11a481a.
Revert "add OTA (2)"

This reverts commit dd6966d7bc7ee85afb07fc0addc6b552909aa8ff.
Revert "add OTA (1)"

This reverts commit 43ed78489e0971ecda31e109db2dbef9658ed5d3.