Remove the Kasko based out of process browser hang instrumentation.

third_party/kasko/kasko.gyp

 {
   'targets': [
     {
       # GN: //third_party/kasko:kasko_features
       'target_name': 'kasko_features',
       'type': 'none',
       'includes': [ '../../build/buildflag_header.gypi' ],
       'variables': {
         'buildflag_header_path': 'third_party/kasko/kasko_features.h',
         'buildflag_flags': [
           'ENABLE_KASKO=<(kasko)',
-          'ENABLE_KASKO_HANG_REPORTS=<(kasko_hang_reports)',
-          'ENABLE_KASKO_FAILED_RDV_REPORTS=<(kasko_failed_rdv_reports)',
         ],
       },
     },
   ],
   'conditions': [
     ['kasko==1', {
       'targets': [
         {
           # GN: //third_party/kasko:copy_kasko_dll
           'target_name': 'copy_kasko_dll',
@@ skipping 54 matching lines @@
             'kasko_features',
           ],
           'export_dependent_settings': [
             'kasko_features',
           ]
         },
       ],
     }],
   ],  # 'conditions'
 }