Revert "Enable task service account on builders using "chromium-ci-builder@""

This reverts commit 012f9ce6.

Reason for revert: can be cause of https://bugs.chromium.org/p/chromium/issues/detail?id=1122461

Original change's description:
> Enable task service account on builders using "chromium-ci-builder@"
> 
> With Goma builders, we have confirmed that
> chromium-ci-builder@chops-service-accounts.iam.gserviceaccount.com
> works as without using task service account for Goma.
> Let me migrate the builders.
> 
> Bug: 1105814
> Change-Id: Ic4dedf38c59f358909014d4f8b0c9379914bcb2c
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2378780
> Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
> Commit-Queue: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#802101}

TBR=ukai@google.com,yyanagisawa@chromium.org,tikuta@chromium.org,yekuang@google.com

Change-Id: I7f75e78ef9eb6f5439d38dcd9b3333ea1ab3a841
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1105814
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2379332Reviewed-by: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Commit-Queue: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802144}

infra/config/dev/subprojects/chromium/ci.star

@@ -47,7 +47,6 @@ defaults.service_account.set(
     "chromium-ci-builder-dev@chops-service-accounts.iam.gserviceaccount.com",
 )
 defaults.swarming_tags.set(["vpython:native-python-wrapper"])
-defaults.goma_use_luci_auth.set(True)
 
 def ci_builder(*, name, **kwargs):
     return builder(

infra/config/generated/cr-buildbucket-dev.cfg

@@ -32,7 +32,6 @@ buckets {
         name: "swarming/staging"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"
-        properties_j: "$build/goma:{\"use_luci_auth\":true}"
         properties_j: "builder_group:\"chromium.dev\""
       }
       execution_timeout_secs: 10800
@@ -58,7 +57,6 @@ buckets {
         name: "swarming/staging"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"
-        properties_j: "$build/goma:{\"use_luci_auth\":true}"
         properties_j: "builder_group:\"chromium.dev\""
       }
       execution_timeout_secs: 10800
@@ -84,7 +82,6 @@ buckets {
         name: "swarming/staging"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"
-        properties_j: "$build/goma:{\"use_luci_auth\":true}"
         properties_j: "builder_group:\"chromium.dev\""
       }
       execution_timeout_secs: 10800
@@ -111,7 +108,6 @@ buckets {
         name: "swarming/staging"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"
-        properties_j: "$build/goma:{\"use_luci_auth\":true}"
         properties_j: "builder_group:\"chromium.dev\""
       }
       execution_timeout_secs: 10800
@@ -137,7 +133,6 @@ buckets {
         name: "swarming/staging"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"
-        properties_j: "$build/goma:{\"use_luci_auth\":true}"
         properties_j: "builder_group:\"chromium.dev\""
       }
       execution_timeout_secs: 10800
@@ -163,7 +158,6 @@ buckets {
         name: "swarming/staging"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"
-        properties_j: "$build/goma:{\"use_luci_auth\":true}"
         properties_j: "builder_group:\"chromium.dev\""
       }
       execution_timeout_secs: 10800
@@ -189,7 +183,6 @@ buckets {
         name: "swarming/staging"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"
-        properties_j: "$build/goma:{\"use_luci_auth\":true}"
         properties_j: "builder_group:\"chromium.dev\""
       }
       execution_timeout_secs: 10800

infra/config/lib/ci.star

@@ -110,7 +110,6 @@ def set_defaults(milestone_vars, **kwargs):
         service_account = "chromium-ci-builder@chops-service-accounts.iam.gserviceaccount.com",
         swarming_tags = ["vpython:native-python-wrapper"],
         triggered_by = [milestone_vars.ci_poller],
-        goma_use_luci_auth = True,
     )
     default_values.update(kwargs)
     for k, v in default_values.items():

infra/config/subprojects/webrtc/webrtc.fyi.star

@@ -44,7 +44,6 @@ defaults.pool.set("luci.chromium.webrtc.fyi")
 defaults.service_account.set("chromium-ci-builder@chops-service-accounts.iam.gserviceaccount.com")
 defaults.swarming_tags.set(["vpython:native-python-wrapper"])
 defaults.triggered_by.set(["webrtc-gitiles-trigger-master"])
-defaults.goma_use_luci_auth.set(True)
 
 # Builders are defined in lexicographic order by name
 

infra/config/subprojects/webrtc/webrtc.star

@@ -37,7 +37,6 @@ defaults.os.set(os.LINUX_DEFAULT)
 defaults.service_account.set("chromium-ci-builder@chops-service-accounts.iam.gserviceaccount.com")
 defaults.swarming_tags.set(["vpython:native-python-wrapper"])
 defaults.triggered_by.set(["master-gitiles-trigger"])
-defaults.goma_use_luci_auth.set(True)
 
 defaults.properties.set({
     "perf_dashboard_machine_group": "ChromiumWebRTC",