JitRegister: Remove OProfile profiler

OProfile is not used at all these days, most major distributions do not ship it anymore (Debian, Fedora, and Alpine to name the few I've checked) and following a discussion on Discord, nobody is apparently using it, most devs not even being aware of it. This removes an optional dependency from Dolphin.

CMakeLists.txt

@@ -119,7 +119,6 @@ option(ENCODE_FRAMEDUMPS "Encode framedumps in AVI format" ON)
 
 option(ENABLE_GPROF "Enable gprof profiling (must be using Debug build)" OFF)
 option(FASTLOG "Enable all logs" OFF)
-option(OPROFILING "Enable profiling" OFF)
 
 # TODO: Add DSPSpy
 option(DSPTOOL "Build dsptool" OFF)
@@ -565,16 +564,6 @@ if(ENCODE_FRAMEDUMPS)
   endif()
 endif()
 
-if(OPROFILING)
-  find_package(OProfile)
-  if(OPROFILE_FOUND)
-    message(STATUS "OProfile found, enabling profiling support")
-    add_definitions(-DUSE_OPROFILE=1)
-  else()
-    message(FATAL_ERROR "OProfile not found. Can't build profiling support.")
-  endif()
-endif()
-
 if(ENABLE_HWDB)
   find_package(LIBUDEV REQUIRED)
   if(LIBUDEV_FOUND)