Revert "Tweak RuntimeInit docs around MimeMap registration."

This reverts commit 098a533e783a0d6486689b62c5bf3d3c45e4df49.

Reason for revert: Base CL caused slower app startup (I don't know why).

Change-Id: Ib67852b900ff2baeb34f5d553fb0d233f5475888
1 file changed