Revert "Set up IRadioConfig 1.3 skeleton"

This reverts commit 83e3ca82e6398603df98c4697360e2d66b6efdae.

Reason for revert: Change will not be supported by modem, so HAL for RadioConfig is no longer necessary.

Change-Id: I2eb83fd2356134ef45a782d99174fdd65f8c5a13
diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index 3c1a810..f1db89d 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -375,7 +375,10 @@
     </hal>
     <hal format="hidl" optional="true">
         <name>android.hardware.radio.config</name>
-        <version>1.3</version>
+        <!--
+        See compatibility_matrix.4.xml on versioning of radio config HAL.
+        -->
+        <version>1.1</version>
         <interface>
             <name>IRadioConfig</name>
             <instance>default</instance>