WifiConfigStore: remove migrateCerts()

The abovementioned method was introduced 3 years ago,
and should not be needed anymore.

BUG: 28124406
Change-Id: Ia5efa8a068c1a68b875bcbe1b21424d7ab201e4a
TEST: 'runtest frameworks-wifi' passes.
1 file changed
tree: 7e6f5d1eab10463aa486629cd04ebe8c59bc7247
  1. service/
  2. tests/