Rename iOS test specs to match buildbot names.

webrtc/build/ios/client.webrtc.fyi/iOS64_Debug_(GN).json

Index: webrtc/build/ios/client.webrtc.fyi/iOS64_Debug_(GN).json
diff --git a/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug_(GN).json b/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug_(GN).json
deleted file mode 100644
index f537def48f0b357ba84ac9a1c81e31712b8d2b4d..0000000000000000000000000000000000000000
--- a/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug_(GN).json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-  "owners": [
-    "kjellander",
-  ],
-  "comments": [
-    "GN + Ninja builder."
-  ],
-  "xcode version": "7.0",
-  "GYP_DEFINES": {
-    "chromium_ios_signing": "0",
-    "target_arch": "arm64"
-  },
-  "gn_args": [
-    "ios_enable_code_signing=false",
-    "target_cpu=\"arm\"",
-    "target_os=\"ios\"",
-    "use_goma=true",
-    "goma_dir=$(goma_dir)"
-  ],
-  "mb_type": "gn",
-  "compiler": "ninja",
-  "configuration": "Debug",
-  "sdk": "iphoneos9.0",
-  "tests": [
-  ]
-}