iSAC: Remove unnecessary WEBRTC_LINUX define.

webrtc/modules/audio_coding/codecs/isac/isacfix.gypi

 # Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'targets': [
@@ skipping 59 matching lines @@
         'fix/source/lpc_masking_model.h',
         'fix/source/lpc_tables.h',
         'fix/source/pitch_estimator.h',
         'fix/source/pitch_gain_tables.h',
         'fix/source/pitch_lag_tables.h',
         'fix/source/settings.h',
         'fix/source/spectrum_ar_model_tables.h',
         'fix/source/structs.h',
       ],
       'conditions': [
-        ['OS!="win"', {
-          'defines': [
-            'WEBRTC_LINUX',
-          ],
-        }],
         ['target_arch=="arm" and arm_version>=7', {
           'sources': [
             'fix/source/lattice_armv7.S',
             'fix/source/pitch_filter_armv6.S',
           ],
           'sources!': [
             'fix/source/lattice_c.c',
             'fix/source/pitch_filter_c.c',
           ],
         }],
@@ skipping 47 matching lines @@
             'fix/source/filterbanks_neon.c',
             'fix/source/filters_neon.c',
             'fix/source/lattice_neon.c',
             'fix/source/transform_neon.c',
           ],
         },
       ],
     }],
   ],
 }