infra: Remove all references to the OSX 10.10 SDK.

scripts/slave/recipe_modules/chromium_tests/chromium_webkit.py

Index: scripts/slave/recipe_modules/chromium_tests/chromium_webkit.py
diff --git a/scripts/slave/recipe_modules/chromium_tests/chromium_webkit.py b/scripts/slave/recipe_modules/chromium_tests/chromium_webkit.py
index 8b814d3bee6ec9ddbf181746d267975a3b386f55..796ac960d8ffbd79bc30bcc9578a3b778b193f4d 100644
--- a/scripts/slave/recipe_modules/chromium_tests/chromium_webkit.py
+++ b/scripts/slave/recipe_modules/chromium_tests/chromium_webkit.py
@@ -219,7 +219,6 @@ SPEC['builders'].update({
   },
   'WebKit Mac10.6': {
     'chromium_config': 'chromium',
-    'chromium_apply_config': ['chromium_mac_sdk_10_10'],
     'gclient_config': 'chromium',
     'gclient_apply_config': ['blink_or_chromium'],
     'chromium_config_kwargs': {
@@ -243,7 +242,6 @@ SPEC['builders'].update({
   },
   'WebKit Mac10.7': {
     'chromium_config': 'chromium',
-    'chromium_apply_config': ['chromium_mac_sdk_10_10'],
     'gclient_config': 'chromium',
     'gclient_apply_config': ['blink_or_chromium'],
     'chromium_config_kwargs': {
@@ -267,7 +265,6 @@ SPEC['builders'].update({
   },
   'WebKit Mac10.8': {
     'chromium_config': 'chromium',
-    'chromium_apply_config': ['chromium_mac_sdk_10_10'],
     'gclient_config': 'chromium',
     'gclient_apply_config': ['blink_or_chromium'],
     'chromium_config_kwargs': {
@@ -315,7 +312,6 @@ SPEC['builders'].update({
   },
   'WebKit Mac10.9': {
     'chromium_config': 'chromium',
-    'chromium_apply_config': ['chromium_mac_sdk_10_10'],
     'gclient_config': 'chromium',
     'gclient_apply_config': ['blink_or_chromium'],
     'chromium_config_kwargs': {
@@ -377,7 +373,6 @@ SPEC['builders'].update({
   },
   'WebKit Mac10.7 (dbg)': {
     'chromium_config': 'chromium',
-    'chromium_apply_config': ['chromium_mac_sdk_10_10'],
     'gclient_config': 'chromium',
     'gclient_apply_config': ['blink_or_chromium'],
     'chromium_config_kwargs': {