[test] Temporarily remove a check from complete_sdk_platform.swift

Author: hamishknight

validation-test/IDE/complete_sdk_platform.swift

@@ -15,4 +15,6 @@ import XCTest
 
 #^COMPLETE^#
 // COMPLETE: Decl[Module]/None/IsSystem: XCTest[#Module#]; name=XCTest
-// COMPLETE: Decl[FreeFunction]/OtherModule[XCTest]/IsSystem: XCTFail()[#Void#]; name=XCTFail()
+
+// FIXME(rdar://134963605) - We also ought to be able to see this:
+// Decl[FreeFunction]/OtherModule[XCTest]/IsSystem: XCTFail()[#Void#]; name=XCTFail()