build: remove erroneous duplicate declaration from node_inspector.gypi

PR-URL: #25586
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: refack

Diff for: src/inspector/node_inspector.gypi

@@ -93,7 +93,6 @@
     },
     {
       'action_name': 'node_protocol_generated_sources',
-      'process_outputs_as_sources': 0,
       'inputs': [
         '<(SHARED_INTERMEDIATE_DIR)/node_protocol_config.json',
         '<(SHARED_INTERMEDIATE_DIR)/node_protocol.json',
@@ -130,7 +129,6 @@
     },
     {
       'action_name': 'v8_inspector_compress_protocol_json',
-      'process_outputs_as_sources': 0,
       'inputs': [
         '<(SHARED_INTERMEDIATE_DIR)/concatenated_protocol.json',
       ],