Remove target-level definition from protocan manifest to avoid conflicts

Bug: 231328148
Test: m -j
Change-Id: I6edbbb7ef14953305bed70b215f3bb44063c8731
diff --git a/emulator/usbpt/protocan/manifest.protocan.xml b/emulator/usbpt/protocan/manifest.protocan.xml
index 6281907..f23cbf9 100644
--- a/emulator/usbpt/protocan/manifest.protocan.xml
+++ b/emulator/usbpt/protocan/manifest.protocan.xml
@@ -1,4 +1,4 @@
-<manifest version="1.0" type="device" target-level="3">
+<manifest version="1.0" type="device">
     <hal format="hidl">
         <name>android.hardware.automotive.can</name>
         <transport>hwbinder</transport>