Remove references to an old gyp variable that's no longer supported.

chrome/chrome_installer.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'lastchange_path': '../build/util/LASTCHANGE',
-    'libpeer_target_type%': 'static_library',
     'branding_dir': 'app/theme/<(branding_path_component)',
     'branding_dir_100': 'app/theme/default_100_percent/<(branding_path_component)',
   },
   'conditions': [
     ['OS=="win"', {
       'targets': [
         {
           'target_name': 'gcapi_dll',
           'type': 'loadable_module',
           'dependencies': [
@@ skipping 467 matching lines @@
               '<(PRODUCT_DIR)/libwidevinecdm.so',
             ],
             'packaging_files_common': [
               '<!(which eu-strip)',
             ],
           }],
           ['target_arch=="arm"', {
             'deb_arch': 'arm',
             'rpm_arch': 'arm',
           }],
-          ['libpeer_target_type!="static_library"', {
-            'packaging_files_binaries': [
-              '<(PRODUCT_DIR)/lib/libpeerconnection.so',
-            ],
-          }],
           ['asan==1', {
             'packaging_files_binaries': [
               '<(PRODUCT_DIR)/lib/libc++.so',
             ],
           }],
         ],
       },
       'targets': [
         {
           'target_name': 'linux_installer_configs',
@@ skipping 592 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'setup_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }