Revert "Add sizes.py isolated_script to chromium.chrome bots. (RELAND)"

This reverts commit 5994cc70.

Reason for revert:
Broke sizes step
https://ci.chromium.org/p/chrome/builders/ci/win-google-rel/3728

Original change's description:
> Add sizes.py isolated_script to chromium.chrome bots. (RELAND)
> 
> This is a reland of crrev.com/c/1604471
> 
> Bug: 961548
> Change-Id: I3cf8d892f0f5f3dad43751dbcc78031ed52ac616
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1607102
> Auto-Submit: John Budorick <jbudorick@chromium.org>
> Commit-Queue: Andrew Grieve <agrieve@chromium.org>
> Commit-Queue: Ben Pastene <bpastene@chromium.org>
> Reviewed-by: Andrew Grieve <agrieve@chromium.org>
> Reviewed-by: Ben Pastene <bpastene@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#659047}

TBR=agrieve@chromium.org,bpastene@chromium.org,jbudorick@chromium.org

Change-Id: Ib49d27c6a9fcc13b391b395a34c672b19f56dc57
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 961548
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1610519Reviewed-by: Alexei Filippov <alph@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659103}

testing/buildbot/chromium.chrome.json

@@ -1713,68 +1713,17 @@
     "additional_compile_targets": [
       "chrome",
       "chrome/installer/linux"
-    ],
-    "isolated_scripts": [
-      {
-        "isolate_name": "chrome_sizes",
-        "merge": {
-          "script": "//tools/perf/process_perf_results.py"
-        },
-        "name": "chrome_sizes",
-        "swarming": {
-          "can_use_on_swarming_builders": true,
-          "dimension_sets": [
-            {
-              "pool": "chrome.tests"
-            }
-          ]
-        }
-      }
     ]
   },
   "mac-google-rel": {
     "additional_compile_targets": [
       "chrome"
-    ],
-    "isolated_scripts": [
-      {
-        "isolate_name": "chrome_sizes",
-        "merge": {
-          "script": "//tools/perf/process_perf_results.py"
-        },
-        "name": "chrome_sizes",
-        "swarming": {
-          "can_use_on_swarming_builders": true,
-          "dimension_sets": [
-            {
-              "pool": "chrome.tests"
-            }
-          ]
-        }
-      }
     ]
   },
   "win-google-rel": {
     "additional_compile_targets": [
       "chrome",
       "chrome_official_builder"
-    ],
-    "isolated_scripts": [
-      {
-        "isolate_name": "chrome_sizes",
-        "merge": {
-          "script": "//tools/perf/process_perf_results.py"
-        },
-        "name": "chrome_sizes",
-        "swarming": {
-          "can_use_on_swarming_builders": true,
-          "dimension_sets": [
-            {
-              "pool": "chrome.tests"
-            }
-          ]
-        }
-      }
     ]
   }
 }

testing/buildbot/gn_isolate_map.pyl

@@ -602,11 +602,6 @@
     "label": "//sandbox/linux:chrome_sandbox",
     "type": "additional_compile_target",
   },
-  "chrome_sizes": {
-    "label": "//chrome/test:chrome_sizes",
-    "type": "generated_script",
-    "script": "bin/chrome_sizes",
-  },
   "chromedriver": {
     "label": "//chrome/test/chromedriver:chromedriver",
     "type": "additional_compile_target",

testing/buildbot/test_suites.pyl

@@ -203,14 +203,6 @@
       },
     },
 
-    'chrome_sizes': {
-      'chrome_sizes': {
-        'merge': {
-          'script': '//tools/perf/process_perf_results.py',
-        },
-      },
-    },
-
     'chromedriver_py_tests_isolated_scripts': {
       'chromedriver_py_tests': {
         "args": [

testing/buildbot/waterfalls.pyl

@@ -652,17 +652,11 @@
         'additional_compile_targets': [
           'chrome',
         ],
-        'mixins': [
-          'chrome-swarming-pool',
-        ],
       },
       'chromeos-betty-google-rel': {
         'additional_compile_targets': [
           'chrome',
         ],
-        'mixins': [
-          'chrome-swarming-pool',
-        ],
       },
       'linux-chromeos-google-rel': {
         'additional_compile_targets': [
@@ -685,35 +679,17 @@
           'chrome',
           'chrome/installer/linux',
         ],
-        'mixins': [
-          'chrome-swarming-pool',
-        ],
-        'test_suites': {
-          'isolated_scripts': 'chrome_sizes',
-        },
       },
       'mac-google-rel': {
         'additional_compile_targets': [
           'chrome',
         ],
-        'mixins': [
-          'chrome-swarming-pool',
-        ],
-        'test_suites': {
-          'isolated_scripts': 'chrome_sizes',
-        },
       },
       'win-google-rel': {
         'additional_compile_targets': [
           'chrome',
           'chrome_official_builder',
         ],
-        'mixins': [
-          'chrome-swarming-pool',
-        ],
-        'test_suites': {
-          'isolated_scripts': 'chrome_sizes',
-        },
       },
     },
   },