Remove ios-simulator-eg configuration file

Bug: 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ib3c61bb6351d79be433fea84842580ab4f950cad
Reviewed-on: https://chromium-review.googlesource.com/777781Reviewed-by: Mike Baxley <baxley@chromium.org>
Commit-Queue: Menglu Huang <huangml@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517660}

ios/build/bots/chromium.mac/ios-simulator-eg.json

-{
-  "comments": [
-    "EarlGrey Tests for 64-bit iOS 11.0 simulators."
-  ],
-  "xcode version": "9.0",
-  "gn_args": [
-    "goma_dir=\"$(goma_dir)\"",
-    "is_component_build=false",
-    "is_debug=true",
-    "target_cpu=\"x64\"",
-    "target_os=\"ios\"",
-    "use_goma=true"
-  ],
-  "configuration": "Debug",
-  "sdk": "iphonesimulator11.0",
-  "tests": [
-    {
-      "app": "ios_chrome_integration_egtests",
-      "test args": [
-        "--enable-features=CredentialManager"
-      ],
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_payments_egtests",
-      "test args": [
-        "--enable-features=WebPayments"
-      ],
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_reading_list_egtests",
-      "test args": [
-        "--enable-reading-list"
-      ],
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_settings_egtests",
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_smoke_egtests",
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_ui_egtests",
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_bookmarks_egtests",
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_web_egtests",
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_showcase_egtests",
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_web_shell_egtests",
-      "device type": "iPhone 6s",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_integration_egtests",
-      "test args": [
-        "--enable-features=CredentialManager"
-      ],
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_payments_egtests",
-      "test args": [
-        "--enable-features=WebPayments"
-      ],
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_reading_list_egtests",
-      "test args": [
-        "--enable-reading-list"
-      ],
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_settings_egtests",
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_smoke_egtests",
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_ui_egtests",
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_bookmarks_egtests",
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_chrome_web_egtests",
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_showcase_egtests",
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    },
-    {
-      "app": "ios_web_shell_egtests",
-      "device type": "iPad Air 2",
-      "os": "11.0",
-      "xcode version": "9.0",
-      "xctest": true
-    }
-  ]
-}