Remove dalvik.vm.usejitprofiles system property.

Disabling profiles is no longer supported. Most of the profile support
has been active even when this property was false, and it won't be
supported in the ART Service.

Test: Boot with dalvik.vm.usejitprofiles=false
Bug: 254434433
Ignore-AOSP-First: The topic has internal dependencies - will c-p to
  AOSP afterwards.
Change-Id: I8edcd02fd0db2553eef2badad6c3506579533bb5