Remove low shard timeout for site_per_process_content_browsertests

Tests are consistently timing out and the low shard timeout of 960
isn't helping here

Bug: 957194
Change-Id: Ibacccb7b82a2d139747e9288ff2078810024c4d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1603493Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Commit-Queue: Brad Hall <bradhall@google.com>
Cr-Commit-Position: refs/heads/master@{#658814}

testing/buildbot/chromium.fyi.json

@@ -2141,8 +2141,7 @@
               "device_type": "bullhead",
               "os": "Android"
             }
-          ],
-          "hard_timeout": 960
+          ]
         },
         "test": "components_browsertests"
       },
@@ -2164,7 +2163,6 @@
               "os": "Android"
             }
           ],
-          "hard_timeout": 960,
           "shards": 5
         },
         "test": "components_unittests"
@@ -2188,7 +2186,6 @@
               "os": "Android"
             }
           ],
-          "hard_timeout": 960,
           "shards": 10
         },
         "test": "content_browsertests"
@@ -2210,8 +2207,7 @@
               "device_type": "bullhead",
               "os": "Android"
             }
-          ],
-          "hard_timeout": 960
+          ]
         },
         "test": "content_unittests"
       },
@@ -2232,8 +2228,7 @@
               "device_type": "bullhead",
               "os": "Android"
             }
-          ],
-          "hard_timeout": 960
+          ]
         },
         "test": "unit_tests"
       }

testing/buildbot/waterfalls.pyl

@@ -1499,7 +1499,6 @@
               'os': 'Android',
             },
           ],
-          'hard_timeout': 960,
         },
         'test_suites': {
           'gtest_tests': 'site_isolation_android_fyi_gtests',