rts: remove redundant rCCCS initialization

This commit removes the redundant logic of initializing each
Capability's rCCCS to CCS_SYSTEM in initProfiling(). Before
initProfiling() is called during RTS startup, each Capability's rCCCS
has already been assigned CCS_SYSTEM when they're first initialized.

(cherry picked from commit a7569495)
(cherry picked from commit 3dace6e1)