libyuv: Remove Mac 32-bit builders

scripts/slave/recipes/libyuv/libyuv.py

Index: scripts/slave/recipes/libyuv/libyuv.py
diff --git a/scripts/slave/recipes/libyuv/libyuv.py b/scripts/slave/recipes/libyuv/libyuv.py
index b4b216b8455a5102a6f6cd7aab9081a1ee5f7364..4e97ab4424dcb3639960b73ac272526bbecc1e0b 100644
--- a/scripts/slave/recipes/libyuv/libyuv.py
+++ b/scripts/slave/recipes/libyuv/libyuv.py
@@ -186,22 +186,6 @@ BUILDERS = freeze({
         },
         'testing': {'platform': 'win'},
       },
-      'Mac32 Debug': {
-        'recipe_config': 'libyuv',
-        'chromium_config_kwargs': {
-          'BUILD_CONFIG': 'Debug',
-          'TARGET_BITS': 32,
-        },
-        'testing': {'platform': 'mac'},
-      },
-      'Mac32 Release': {
-        'recipe_config': 'libyuv',
-        'chromium_config_kwargs': {
-          'BUILD_CONFIG': 'Release',
-          'TARGET_BITS': 32,
-        },
-        'testing': {'platform': 'mac'},
-      },
       'Mac64 Debug': {
         'recipe_config': 'libyuv',
         'chromium_config_kwargs': {
@@ -223,7 +207,7 @@ BUILDERS = freeze({
         'chromium_apply_config': ['asan'],
         'chromium_config_kwargs': {
           'BUILD_CONFIG': 'Release',
-          'TARGET_BITS': 32,
+          'TARGET_BITS': 64,
         },
         'testing': {'platform': 'mac'},
       },
@@ -463,7 +447,7 @@ BUILDERS = freeze({
         'recipe_config': 'libyuv',
         'chromium_config_kwargs': {
           'BUILD_CONFIG': 'Debug',
-          'TARGET_BITS': 32,
+          'TARGET_BITS': 64,
         },
         'testing': {'platform': 'mac'},
       },
@@ -471,14 +455,6 @@ BUILDERS = freeze({
         'recipe_config': 'libyuv',
         'chromium_config_kwargs': {
           'BUILD_CONFIG': 'Release',
-          'TARGET_BITS': 32,
-        },
-        'testing': {'platform': 'mac'},
-      },
-      'mac_x64_rel': {
-        'recipe_config': 'libyuv',
-        'chromium_config_kwargs': {
-          'BUILD_CONFIG': 'Release',
           'TARGET_BITS': 64,
         },
         'testing': {'platform': 'mac'},
@@ -488,7 +464,7 @@ BUILDERS = freeze({
         'chromium_apply_config': ['asan'],
         'chromium_config_kwargs': {
           'BUILD_CONFIG': 'Release',
-          'TARGET_BITS': 32,
+          'TARGET_BITS': 64,
         },
         'testing': {'platform': 'mac'},
       },