Remove Pixel 4 GPU benchmarks (#13188)

We don't run Vulkan GPU benchmarks on Pixel 4 due to old driver issue.


https://github.com/openxla/iree/blob/ab5bcbd26627936c5a3375ff2734b56f3f04ec03/build_tools/buildkite/cmake/android/arm64-v8a/benchmark2.yml#L48-L57

build_tools/python/e2e_test_framework/device_specs/device_collections.py

diff --git a/build_tools/python/e2e_test_framework/device_specs/device_collections.py b/build_tools/python/e2e_test_framework/device_specs/device_collections.py
index aaaff2d..9ca4886 100644
--- a/build_tools/python/e2e_test_framework/device_specs/device_collections.py
+++ b/build_tools/python/e2e_test_framework/device_specs/device_collections.py
@@ -49,7 +49,6 @@
     # Pixel 4
     pixel_4_specs.LITTLE_CORES,
     pixel_4_specs.BIG_CORES,
-    pixel_4_specs.GPU,
     # Pixel 6 Pro
     pixel_6_pro_specs.LITTLE_CORES,
     pixel_6_pro_specs.BIG_CORES,

build_tools/python/e2e_test_framework/device_specs/pixel_4_specs.py

diff --git a/build_tools/python/e2e_test_framework/device_specs/pixel_4_specs.py b/build_tools/python/e2e_test_framework/device_specs/pixel_4_specs.py
index c3c5fc2..529c145 100644
--- a/build_tools/python/e2e_test_framework/device_specs/pixel_4_specs.py
+++ b/build_tools/python/e2e_test_framework/device_specs/pixel_4_specs.py
@@ -25,9 +25,3 @@
     host_environment=common_definitions.HostEnvironment.ANDROID_ARMV8_2_A,
     device_parameters=[device_parameters.ARM_LITTLE_CORES],
     tags=["little-core"])
-GPU = common_definitions.DeviceSpec.build(
-    id=unique_ids.DEVICE_SPEC_MOBILE_PIXEL_4 + "-gpu",
-    device_name=DEVICE_NAME,
-    architecture=common_definitions.DeviceArchitecture.QUALCOMM_ADRENO,
-    host_environment=common_definitions.HostEnvironment.ANDROID_ARMV8_2_A,
-    tags=["gpu"])