Fix removing enterprise suggestion certificate

Make when remove a enterprise suggestion, use the internal config object
to remove ketStore. Which has certificate alias.

Bug: 150500247
Test: atest com.android.server.wifi
Merged-In: Id020e16fb6c26f38eb217248f7296b9ae4b0e781
Change-Id: I8015d87599d843e022805ce69fd5a4eae4d7b066
2 files changed