Remove invalid second OFDM<->FIC connection.

Loading gives a warning:

```
>>> Error: Connection between dab_ofdm_demod_0(1) and dab_fic_decode_0(1) could not be made
                    	source key 1 not in source blcock keys
```

Author: yath

examples/simple_top.grc

@@ -924,12 +924,6 @@
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
-  <connection>
-    <source_block_id>dab_ofdm_demod_0</source_block_id>
-    <sink_block_id>dab_fic_decode_0</sink_block_id>
-    <source_key>1</source_key>
-    <sink_key>1</sink_key>
-  </connection>
   <connection>
     <source_block_id>dab_fic_decode_0</source_block_id>
     <sink_block_id>blocks_null_sink_0</sink_block_id>