Revert "Add the keys I used to sign the market version of Superuser."

These are obsolete.

This reverts commit 0f15d18a50d721faa8dee67f763405354025e25a.

Change-Id: I645686c5049f8651e99c95f2b775aaae2cca1f3a
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0