Revert of [telemetry] Read MSRs from a separate privileged process.

tools/telemetry/telemetry/core/platform/platform_backend.py

Index: tools/telemetry/telemetry/core/platform/platform_backend.py
diff --git a/tools/telemetry/telemetry/core/platform/platform_backend.py b/tools/telemetry/telemetry/core/platform/platform_backend.py
index 710b8e596d45cffa86725b5d2f5496ca53cf3600..0d6ae3465f9513cd73a2e39f2be521e3cba7397d 100644
--- a/tools/telemetry/telemetry/core/platform/platform_backend.py
+++ b/tools/telemetry/telemetry/core/platform/platform_backend.py
@@ -207,11 +207,3 @@
 
   def StopMonitoringPower(self):
     raise NotImplementedError()
-
-  def ReadMsr(self, msr_number):
-    """Read a CPU model-specific register (MSR).
-
-    Which MSRs are available depends on the CPU model.
-    On systems with multiple CPUs, this function may run on any CPU.
-    """
-    raise NotImplementedError()