Internal change

PiperOrigin-RevId: 424746377
Change-Id: I93368881ed74ad38379a63342c42781be6a5aac9
diff --git a/src/pb/common.proto b/src/pb/common.proto
index a7dacaf..cb6f1f0 100644
--- a/src/pb/common.proto
+++ b/src/pb/common.proto
@@ -16,14 +16,6 @@
 // is next copied.
 ////////////////////////////////////////////////////////////////////////////////
 
-// The state of a single experiment on a device.
-message Experiment {
-  // The id of the experiment as defined by the Experiment framework.
-  int64 experiment_id = 1;
-  // The id of the experiment arm as defined by the Experiment framework.
-  int64 arm_id = 2;
-}
-
 // A single experiment token with its associated experiments namespace.
 message ExperimentToken {
   // The experiments namespace is the namespace containing the experiment ids to