Revert of [devtools] Support different encodings for Page.CaptureScreenshot.

testing/buildbot/chromium.mac.json

Index: testing/buildbot/chromium.mac.json
diff --git a/testing/buildbot/chromium.mac.json b/testing/buildbot/chromium.mac.json
index 710920b230e4227673cf3a8801f85c57d6f53bbd..72133986d4833cad0abad91093f6131695d64d27 100644
--- a/testing/buildbot/chromium.mac.json
+++ b/testing/buildbot/chromium.mac.json
@@ -13,7 +13,6 @@
       "pdf_unittests",
       "printing_unittests",
       "skia_unittests",
-      "snapshot_unittests",
       "sql_unittests",
       "storage_unittests",
       "ui_base_unittests",
@@ -303,12 +302,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "snapshot_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "sql_unittests"
       },
       {
@@ -660,12 +653,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "snapshot_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "sql_unittests"
       },
       {
@@ -1018,12 +1005,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "snapshot_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "sql_unittests"
       },
       {
@@ -1364,12 +1345,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "snapshot_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "sql_unittests"
       },
       {