build: remove empty VCLibrarianTool entry

PR-URL: #17191
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Bartosz Sosnowski <bartosz@janeasystems.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

Author: danbev

common.gypi

@@ -208,8 +208,6 @@
         'DisableSpecificWarnings': ['4267'],
         'WarnAsError': 'false',
       },
-      'VCLibrarianTool': {
-      },
       'VCLinkerTool': {
         'conditions': [
           ['target_arch=="ia32"', {