Revert 5737 "Add system wrapper dependency to libjingle targets."

Adding additional dependency is not required for libjingle targets.

> Add system wrapper dependency to libjingle targets.
> This is necessary to handle usage of STR_CASE_CMP in
> common_types.h ( as in https://webrtc-codereview.appspot.com/10099005/)
> 
> TBR=wu@webrtc.org
> 
> Review URL: https://webrtc-codereview.appspot.com/10309004

TBR=mallinath@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/10379004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5744 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/talk/libjingle.gyp b/talk/libjingle.gyp
index e2b7c30..73c8a04 100755
--- a/talk/libjingle.gyp
+++ b/talk/libjingle.gyp
@@ -992,7 +992,6 @@
         '<(DEPTH)/third_party/libsrtp/libsrtp.gyp:libsrtp',
         'libjingle',
         'libjingle_media',
-        '<(webrtc_root)/system_wrappers/source/system_wrappers.gyp:system_wrappers',
       ],
       'include_dirs': [
         '<(DEPTH)/testing/gtest/include',
@@ -1134,7 +1133,6 @@
         'libjingle',
         'libjingle_media',
         'libjingle_p2p',
-        '<(webrtc_root)/system_wrappers/source/system_wrappers.gyp:system_wrappers',
       ],
       'sources': [
         'app/webrtc/audiotrack.cc',
diff --git a/talk/libjingle_tests.gyp b/talk/libjingle_tests.gyp
index 2deddd4..31dc551 100755
--- a/talk/libjingle_tests.gyp
+++ b/talk/libjingle_tests.gyp
@@ -60,7 +60,6 @@
       'target_name': 'libjingle_unittest_main',
       'type': 'static_library',
       'dependencies': [
-        '<(DEPTH)/webrtc/system_wrappers/source/system_wrappers.gyp:system_wrappers',
         '<(DEPTH)/third_party/libyuv/libyuv.gyp:libyuv',
         'gunit',
       ],
@@ -257,7 +256,6 @@
         'gunit',
         'libjingle.gyp:libjingle_media',
         'libjingle_unittest_main',
-        '<(DEPTH)/webrtc/system_wrappers/source/system_wrappers.gyp:system_wrappers',
       ],
       # TODO(ronghuawu): Avoid the copies.
       # https://code.google.com/p/libjingle/issues/detail?id=398
@@ -332,7 +330,6 @@
         'libjingle.gyp:libjingle',
         'libjingle.gyp:libjingle_p2p',
         'libjingle_unittest_main',
-        '<(DEPTH)/webrtc/system_wrappers/source/system_wrappers.gyp:system_wrappers',
       ],
       'include_dirs': [
         '<(DEPTH)/third_party/libsrtp/srtp',
@@ -391,7 +388,6 @@
         'libjingle.gyp:libjingle_p2p',
         'libjingle.gyp:libjingle_peerconnection',
         'libjingle_unittest_main',
-        '<(DEPTH)/webrtc/system_wrappers/source/system_wrappers.gyp:system_wrappers',
       ],
       # TODO(ronghuawu): Reenable below unit tests that require gmock.
       'sources': [