Remove unnecessary iOS try bot configs

ios/build/bots/tryserver.chromium.mac/ios_dbg_simulator_ninja_ng.json

Index: ios/build/bots/tryserver.chromium.mac/ios_dbg_simulator_ninja_ng.json
diff --git a/ios/build/bots/tryserver.chromium.mac/ios_dbg_simulator_ninja_ng.json b/ios/build/bots/tryserver.chromium.mac/ios_dbg_simulator_ninja_ng.json
deleted file mode 100644
index 24dfb6b92c06d03a9025f2fe0c8708187d097086..0000000000000000000000000000000000000000
--- a/ios/build/bots/tryserver.chromium.mac/ios_dbg_simulator_ninja_ng.json
+++ /dev/null
@@ -1,78 +0,0 @@
-{
-  "owners": [
-    "smut"
-  ],
-  "comments": [
-    "Tests for 32-bit iOS 7.1 iPhone simulator."
-  ],
-  "xcode version": "5.1",
-  "GYP_DEFINES": {
-    "chromium_ios_signing": "0",
-    "target_subarch": "arm32"
-  },
-  "compiler": "ninja",
-  "configuration": "Debug",
-  "sdk": "iphonesimulator7.1",
-  "tests": [
-    {
-      "app": "ios_chrome_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "base_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "components_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "crypto_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "gfx_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "url_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "content_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "net_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "ui_base_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "ui_ios_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "sync_unit_tests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    },
-    {
-      "app": "sql_unittests",
-      "device type": "iPhone Retina (4-inch)",
-      "os": "7.1"
-    }
-  ]
-}