Revert "Support loading system font map from SharedMemory."

This reverts commit c7a5b3a9.

Reason for revert: DroidMonitor: Potential culprit for Bug 173096532 - verifying through Forrest before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: If71083df98155ae9e7f55ed1ca49b15456d12a82