Remove the PlzNavigate browser_tests filter as all tests are now passing.

testing/buildbot/chromium.fyi.json

 {
   "Android Asan Builder Tests (dbg)": {
     "gtest_tests": [
       {
         "args": [
           "--tool=asan"
         ],
         "swarming": {
           "can_use_on_swarming_builders": false
         },
@@ skipping 1676 matching lines @@
         },
         "test": "sandbox_linux_unittests"
       }
     ]
   },
   "Browser Side Navigation Linux": {
     "gtest_tests": [
       {
         "args": [
           "--enable-browser-side-navigation",
-          "--test-launcher-filter-file=../../testing/buildbot/filters/browser-side-navigation.linux.browser_tests.filter",
           "--test-launcher-retry-limit=6"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "shards": 5
         },
         "test": "browser_tests"
       },
       {
         "args": [
@@ skipping 20 matching lines @@
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "unit_tests"
       }
     ],
     "scripts": [
       {
         "args": [
-          "browser_tests",
-          "../../testing/buildbot/filters/browser-side-navigation.linux.browser_tests.filter"
-        ],
-        "name": "count_filtered_tests_browser_tests",
-        "script": "count_filtered_tests.py"
-      },
-      {
-        "args": [
           "content_browsertests",
           "../../testing/buildbot/filters/browser-side-navigation.linux.content_browsertests.filter"
         ],
         "name": "count_filtered_tests_content_browsertests",
         "script": "count_filtered_tests.py"
       }
     ]
   },
   "CFI Linux": {
     "gtest_tests": [
@@ skipping 12506 matching lines @@
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "views_unittests"
       }
     ]
   }
 }