iOS: Remove MB and Goma for GYP builders.

This reverts "iOS: Add mb_type config for GYP builders."
and also removes Goma from these builders, as it will not work for WebRTC
since MB's GYP mode is hardcoded to use gyp_chromium.
MB should be working for GN since it's a stand-alone tool.

Goma doesn't work since $(goma_dir) in the JSON throws an error during
compile. So let's turn off Goma for these bots for now.

BUG=chromium:498746
NOTRY=True
TBR=smut@google.com

Review URL: https://codereview.webrtc.org/1685683007

Cr-Commit-Position: refs/heads/master@{#11578}
diff --git a/webrtc/build/ios/client.webrtc.fyi/iOS32_Debug.json b/webrtc/build/ios/client.webrtc.fyi/iOS32_Debug.json
index e74a3ae..c6c0683 100644
--- a/webrtc/build/ios/client.webrtc.fyi/iOS32_Debug.json
+++ b/webrtc/build/ios/client.webrtc.fyi/iOS32_Debug.json
@@ -8,11 +8,8 @@
   "xcode version": "7.0",
   "GYP_DEFINES": {
     "chromium_ios_signing": "0",
-    "target_arch": "arm",
-    "use_goma": "1",
-    "gomadir": "$(goma_dir)"
+    "target_arch": "arm"
   },
-  "mb_type": "gyp",
   "compiler": "ninja",
   "configuration": "Debug",
   "sdk": "iphoneos9.0",
diff --git a/webrtc/build/ios/client.webrtc.fyi/iOS32_Release.json b/webrtc/build/ios/client.webrtc.fyi/iOS32_Release.json
index 063c65c..cacc11f 100644
--- a/webrtc/build/ios/client.webrtc.fyi/iOS32_Release.json
+++ b/webrtc/build/ios/client.webrtc.fyi/iOS32_Release.json
@@ -8,11 +8,8 @@
   "xcode version": "7.0",
   "GYP_DEFINES": {
     "chromium_ios_signing": "0",
-    "target_arch": "arm",
-    "use_goma": "1",
-    "gomadir": "$(goma_dir)"
+    "target_arch": "arm"
   },
-  "mb_type": "gyp",
   "compiler": "ninja",
   "configuration": "Release",
   "sdk": "iphoneos9.0",
diff --git a/webrtc/build/ios/client.webrtc.fyi/iOS32_Simulator_Debug.json b/webrtc/build/ios/client.webrtc.fyi/iOS32_Simulator_Debug.json
index 3755348..516eeaf 100644
--- a/webrtc/build/ios/client.webrtc.fyi/iOS32_Simulator_Debug.json
+++ b/webrtc/build/ios/client.webrtc.fyi/iOS32_Simulator_Debug.json
@@ -8,11 +8,8 @@
   "xcode version": "7.0",
   "GYP_DEFINES": {
     "chromium_ios_signing": "0",
-    "target_arch": "ia32",
-    "use_goma": "1",
-    "gomadir": "$(goma_dir)"
+    "target_arch": "ia32"
   },
-  "mb_type": "gyp",
   "compiler": "ninja",
   "configuration": "Debug",
   "sdk": "iphonesimulator9.0",
diff --git a/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug.json b/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug.json
index 2af231e..657ba91 100644
--- a/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug.json
+++ b/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug.json
@@ -8,11 +8,8 @@
   "xcode version": "7.0",
   "GYP_DEFINES": {
     "chromium_ios_signing": "0",
-    "target_arch": "arm64",
-    "use_goma": "1",
-    "gomadir": "$(goma_dir)"
+    "target_arch": "arm64"
   },
-  "mb_type": "gyp",
   "compiler": "ninja",
   "configuration": "Debug",
   "sdk": "iphoneos9.0",
diff --git "a/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug_\050GN\051.json" "b/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug_\050GN\051.json"
index f537def..eefcdd1 100644
--- "a/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug_\050GN\051.json"
+++ "b/webrtc/build/ios/client.webrtc.fyi/iOS64_Debug_\050GN\051.json"
@@ -1,6 +1,6 @@
 {
   "owners": [
-    "kjellander",
+    "kjellander"
   ],
   "comments": [
     "GN + Ninja builder."
@@ -13,9 +13,7 @@
   "gn_args": [
     "ios_enable_code_signing=false",
     "target_cpu=\"arm\"",
-    "target_os=\"ios\"",
-    "use_goma=true",
-    "goma_dir=$(goma_dir)"
+    "target_os=\"ios\""
   ],
   "mb_type": "gn",
   "compiler": "ninja",
diff --git a/webrtc/build/ios/client.webrtc.fyi/iOS64_Release.json b/webrtc/build/ios/client.webrtc.fyi/iOS64_Release.json
index 6b53990..097a1b1 100644
--- a/webrtc/build/ios/client.webrtc.fyi/iOS64_Release.json
+++ b/webrtc/build/ios/client.webrtc.fyi/iOS64_Release.json
@@ -8,11 +8,8 @@
   "xcode version": "7.0",
   "GYP_DEFINES": {
     "chromium_ios_signing": "0",
-    "target_arch": "arm64",
-    "use_goma": "1",
-    "gomadir": "$(goma_dir)"
+    "target_arch": "arm64"
   },
-  "mb_type": "gyp",
   "compiler": "ninja",
   "configuration": "Release",
   "sdk": "iphoneos9.0",
diff --git "a/webrtc/build/ios/client.webrtc.fyi/iOS64_Release_\050GN\051.json" "b/webrtc/build/ios/client.webrtc.fyi/iOS64_Release_\050GN\051.json"
index 02ee078..bb32411 100644
--- "a/webrtc/build/ios/client.webrtc.fyi/iOS64_Release_\050GN\051.json"
+++ "b/webrtc/build/ios/client.webrtc.fyi/iOS64_Release_\050GN\051.json"
@@ -1,6 +1,6 @@
 {
   "owners": [
-    "kjellander",
+    "kjellander"
   ],
   "comments": [
     "GN + Ninja builder."
@@ -13,9 +13,7 @@
   "gn_args": [
     "ios_enable_code_signing=false",
     "target_cpu=\"arm\"",
-    "target_os=\"ios\"",
-    "use_goma=true",
-    "goma_dir=$(goma_dir)"
+    "target_os=\"ios\""
   ],
   "mb_type": "gn",
   "compiler": "ninja",
diff --git a/webrtc/build/ios/client.webrtc.fyi/iOS64_Simulator_Debug.json b/webrtc/build/ios/client.webrtc.fyi/iOS64_Simulator_Debug.json
index 18e9a20..c997b52 100644
--- a/webrtc/build/ios/client.webrtc.fyi/iOS64_Simulator_Debug.json
+++ b/webrtc/build/ios/client.webrtc.fyi/iOS64_Simulator_Debug.json
@@ -8,11 +8,8 @@
   "xcode version": "7.0",
   "GYP_DEFINES": {
     "chromium_ios_signing": "0",
-    "target_arch": "x64",
-    "use_goma": "1",
-    "gomadir": "$(goma_dir)"
+    "target_arch": "x64"
   },
-  "mb_type": "gyp",
   "compiler": "ninja",
   "configuration": "Debug",
   "sdk": "iphonesimulator9.0",