Remove a few unreferenced source_set()s.

They've been unused since they were added in
https://codereview.chromium.org/2233103002 . All these test .cc files
are also listed in either unit_tests_shared or unit_tests_desktop,
which _are_ referenced (by components_unittests).

No behavior change.

Bug: none
Change-Id: I5a21eab61de2cee66f5358151b9ea423ffb5fa1e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1719293
Auto-Submit: Nico Weber <thakis@chromium.org>
Commit-Queue: Varun Khaneja <vakh@chromium.org>
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#681173}

components/safe_browsing/db/BUILD.gn

@@ -281,84 +281,6 @@ static_library("v4_update_protocol_manager") {
   ]
 }
 
-source_set("v4_database_unittest") {
-  testonly = true
-  sources = [
-    "v4_database_unittest.cc",
-  ]
-  deps = [
-    ":v4_database",
-    ":v4_store",
-    "//base",
-    "//base/test:test_support",
-    "//content/test:test_support",
-    "//testing/gtest",
-  ]
-}
-
-source_set("v4_get_hash_protocol_manager_unittest") {
-  testonly = true
-  sources = [
-    "v4_get_hash_protocol_manager_unittest.cc",
-  ]
-  deps = [
-    ":safebrowsing_proto",
-    ":util",
-    ":v4_database",
-    ":v4_get_hash_protocol_manager",
-    ":v4_local_database_manager",
-    ":v4_test_util",
-    "//base",
-    "//base/test:test_support",
-    "//content/test:test_support",
-    "//net",
-    "//net:test_support",
-    "//services/network:test_support",
-    "//testing/gtest",
-  ]
-}
-
-source_set("v4_local_database_manager_unittest") {
-  testonly = true
-  sources = [
-    "v4_local_database_manager_unittest.cc",
-  ]
-  deps = [
-    ":v4_database",
-    ":v4_local_database_manager",
-    ":v4_protocol_manager_util",
-    ":v4_test_util",
-    "//base",
-    "//base/test:test_support",
-    "//components/safe_browsing:features",
-    "//content/test:test_support",
-    "//net",
-    "//net:test_support",
-    "//services/network:test_support",
-    "//testing/gtest",
-  ]
-}
-
-source_set("v4_update_protocol_manager_unittest") {
-  testonly = true
-  sources = [
-    "v4_update_protocol_manager_unittest.cc",
-  ]
-  deps = [
-    ":safebrowsing_proto",
-    ":util",
-    ":v4_test_util",
-    ":v4_update_protocol_manager",
-    "//base",
-    "//base/test:test_support",
-    "//content/public/common",
-    "//net",
-    "//net:test_support",
-    "//services/network:test_support",
-    "//testing/gtest",
-  ]
-}
-
 source_set("unit_tests_shared") {
   testonly = true
   sources = [
@@ -443,24 +365,6 @@ static_library("allowlist_checker_client") {
   ]
 }
 
-source_set("allowlist_checker_client_unittest") {
-  testonly = true
-  sources = [
-    "allowlist_checker_client_unittest.cc",
-  ]
-  deps = [
-    ":allowlist_checker_client",
-    ":database_manager",
-    ":test_database_manager",
-    "//base:base",
-    "//base/test:test_support",
-    "//content/public/browser",
-    "//content/test:test_support",
-    "//testing/gmock:gmock",
-    "//testing/gtest:gtest",
-  ]
-}
-
 fuzzer_test("v4_get_hash_protocol_manager_fuzzer") {
   sources = [
     "v4_get_hash_protocol_manager_fuzzer.cc",