Remove @hal_type from .hal files.

Test: ran make android.hardware.nfc@1.0 successfully
      compiles.

Bug: 31527823

Change-Id: Ib2c2f40ef6a8939a8344ade6138a7b0f32f14ba9
diff --git a/tests/expression/1.0/IExpression.hal b/tests/expression/1.0/IExpression.hal
index 3dea9a4..ead131f 100644
--- a/tests/expression/1.0/IExpression.hal
+++ b/tests/expression/1.0/IExpression.hal
@@ -15,7 +15,7 @@
  */
 
 package android.hardware.tests.expression@1.0;
-@hal_type(type="LIGHT")
+
 interface IExpression {
   enum UInt64LiteralTypeGuessing : uint64_t {
     noSuffixDec1 = 0,