Revert "Implements some StrictMath functions for improved performance."

This reverts commit 3993db1d1b8da908815f53f581e9fc4ebb1bac4a.
Revert "Implements some math functions for faster performance"

This reverts commit e8aef6e63bc409f9536fbdf7feb76072ca1fc77b.
Revert "Fix an array copy optimization bug."

This reverts commit aad7ea03307e17d0a03c76dcc1ffa1e4f91d0d8b.
Revert "A char array copy optimization (libcore)."

This reverts commit 541bb82231f8bf05bca0fd0f161ac467a75e765a.