Remove duplicated v1 builds. (flutter#44767)

This is part of the cleanup of the migration to engine v2 builds.

Bug: flutter/flutter#132600

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style

.ci.yaml

@@ -91,26 +91,6 @@ targets:
       config_name: linux_android_emulator
     timeout: 60
 
-  - name: Linux Android Emulator Tests
-    bringup: true
-    recipe: engine/scenarios
-    enabled_branches:
-      - main
-    properties:
-      dependencies: >-
-        [
-          {"dependency": "android_virtual_device", "version": "33"},
-          {"dependency": "goldctl", "version": "git_revision:f808dcff91b221ae313e540c09d79696cd08b8de"}
-        ]
-      upload_packages: "true"
-      clobber: "true"
-    timeout: 60
-    runIf:
-      - DEPS
-      - .ci.yaml
-      - testing/**
-      - shell/platform/android/**
-
   - name: Linux builder_cache
     enabled_branches:
       - main
@@ -178,14 +158,6 @@ targets:
       config_name: linux_benchmarks
     timeout: 60
 
-  - name: Linux Benchmarks (no-upload)
-    recipe: engine/engine_metrics
-    bringup: true
-    properties:
-      build_host: "true"
-      upload_metrics: "false"
-    timeout: 60
-
   - name: Linux Fuchsia
     recipe: engine/engine
     properties: