Remove @hal_type from .hal files.

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

Bug: 31527823

Change-Id: Ib2c2f40ef6a8939a8344ade6138a7b0f32f14ba9

nfc/1.0/INfc.hal

@@ -18,7 +18,6 @@ package android.hardware.nfc@1.0;
 
 import INfcClientCallback;
 
-@hal_type(type="NFC")
 interface INfc {
     /*
      * Opens the NFC controller device and performs initialization.

nfc/1.0/INfcClientCallback.hal

@@ -16,7 +16,6 @@
 
 package android.hardware.nfc@1.0;
 
-@hal_type(type="NFC")
 interface INfcClientCallback {
     /*
      * The callback passed in from the NFC stack that the HAL

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,