Remove stale target reference.
diff --git a/objectivec/ProtocolBuffers_iOS.xcodeproj/xcshareddata/xcschemes/PerformanceTests.xcscheme b/objectivec/ProtocolBuffers_iOS.xcodeproj/xcshareddata/xcschemes/PerformanceTests.xcscheme
index 77483d3..1a02f7e 100644
--- a/objectivec/ProtocolBuffers_iOS.xcodeproj/xcshareddata/xcschemes/PerformanceTests.xcscheme
+++ b/objectivec/ProtocolBuffers_iOS.xcodeproj/xcshareddata/xcschemes/PerformanceTests.xcscheme
@@ -315,16 +315,6 @@
debugDocumentVersioning = "YES"
debugServiceExtension = "internal"
allowLocationSimulation = "YES">
- <BuildableProductRunnable
- runnableDebuggingMode = "0">
- <BuildableReference
- BuildableIdentifier = "primary"
- BlueprintIdentifier = "8B9A5EA41831993600A9D33B"
- BuildableName = "iOSTestHarness.app"
- BlueprintName = "iOSTestHarness"
- ReferencedContainer = "container:ProtocolBuffers_iOS.xcodeproj">
- </BuildableReference>
- </BuildableProductRunnable>
<AdditionalOptions>
</AdditionalOptions>
</LaunchAction>