init: Remove /acct

The cpuacct controller has not been mounted at /acct since 2018 with
commit 192aee782 ("libprocessgroup: Add support for task profiles").

Test: atest FrameworksMockingServicesTests:AppChildProcessTest
Test: atest CtsAppTestCases:ActivityManagerTest
Change-Id: I411741232dde59acd2e3af33e0e89230f7a133a8
2 files changed