Remove product_is_iot.

Test: treehugger
Change-Id: I0935f463138e1d2a364cd2a5bc8b6e977da1ec47
diff --git a/android/variable.go b/android/variable.go
index e9379b7..bfff81c 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -59,17 +59,6 @@
 			Cflags []string
 		}
 
-		// Product_is_iot is true for Android Things devices.
-		Product_is_iot struct {
-			Cflags       []string
-			Enabled      bool
-			Exclude_srcs []string
-			Init_rc      []string
-			Shared_libs  []string
-			Srcs         []string
-			Static_libs  []string
-		}
-
 		// treble_linker_namespaces is true when the system/vendor linker namespace separation is
 		// enabled.
 		Treble_linker_namespaces struct {
@@ -262,8 +251,6 @@
 
 	Override_rs_driver *string `json:",omitempty"`
 
-	Product_is_iot *bool `json:",omitempty"`
-
 	Fuchsia *bool `json:",omitempty"`
 
 	DeviceKernelHeaders []string `json:",omitempty"`