test: fix test by removing node-inspect/lib/_inspect

If this file is loaded with Node.js build without ssl, it will load
'node-inspect/lib/internal/inspect_client' as well. Due to that two
deprecation warnings will be emitted instead of one and the test
fails.

It should be safe to just test all other cases and to ignore this
specific file.

test/parallel/test-require-deps-deprecation.js

@@ -4,7 +4,6 @@ const common = require('../common');
 const assert = require('assert');
 
 const deprecatedModules = [
-  'node-inspect/lib/_inspect',
   'node-inspect/lib/internal/inspect_client',
   'node-inspect/lib/internal/inspect_repl',
   'v8/tools/SourceMap',