perf counter cleanup (mostly intervals)

Some of these perf counters were useful during initial development, but realistically aren't needed anymore, some are redundant when we can now see the average interval from `work_queue status` and some of them simply aren't worth the cost at higher rates.

src/lib/drivers/accelerometer/CMakeLists.txt

@@ -32,4 +32,8 @@
 ############################################################################
 
 px4_add_library(drivers_accelerometer PX4Accelerometer.cpp)
-target_link_libraries(drivers_accelerometer PRIVATE drivers__device)
+target_link_libraries(drivers_accelerometer
+	PRIVATE
+		drivers__device
+		mathlib
+	)