libyuv: Remove all GYP builders.

masters/master.client.libyuv/slaves.cfg

Index: masters/master.client.libyuv/slaves.cfg
diff --git a/masters/master.client.libyuv/slaves.cfg b/masters/master.client.libyuv/slaves.cfg
index b0da5d7badfa7088ab104dd25d5e01a6d3106014..fb06708f4c3209f83bebb65e470bb0c0bf6c718e 100644
--- a/masters/master.client.libyuv/slaves.cfg
+++ b/masters/master.client.libyuv/slaves.cfg
@@ -25,8 +25,6 @@ slaves = [
     'builder': [
       'Linux64 Debug',
       'Linux64 Release',
-      'Linux64 Debug (GYP)',
-      'Linux64 Release (GYP)',
       # TODO(kjellander): Add when trybot is green (crbug.com/625889).
       #'Linux GCC',
       'Linux Asan',
@@ -37,8 +35,6 @@ slaves = [
       'Linux UBSan vptr',
       'Android Debug',
       'Android Release',
-      'Android Debug (GYP)',
-      'Android Release (GYP)',
       'Android Clang Debug',
       'Android ARM64 Debug',
       'Android32 x86 Debug',
@@ -71,8 +67,6 @@ slaves = [
     'builder': [
       'Mac64 Debug',
       'Mac64 Release',
-      'Mac64 Debug (GYP)',
-      'Mac64 Release (GYP)',
       'Mac Asan',
       'iOS Debug',
       'iOS Release',
@@ -89,14 +83,6 @@ slaves = [
     'version': 'win7',
     'bits': '64',
     'builder': [
-      'Win32 Debug (VS2010)',
-      'Win32 Release (VS2010)',
-      'Win64 Debug (VS2010)',
-      'Win64 Release (VS2010)',
-      'Win32 Debug (VS2012)',
-      'Win32 Release (VS2012)',
-      'Win64 Debug (VS2012)',
-      'Win64 Release (VS2012)',
       'Win32 Debug (VS2013)',
       'Win32 Release (VS2013)',
       'Win64 Debug (VS2013)',
@@ -105,8 +91,6 @@ slaves = [
       'Win32 Release (Clang)',
       'Win64 Debug (Clang)',
       'Win64 Release (Clang)',
-      'Win64 Debug (GYP)',
-      'Win64 Release (GYP)',
     ],
     'hostname': 'vm%d-m3' % i,
   } for i in [32, 324]