Remove conditional build dep for form_parsing

In components/password_manager/core/browser/BUILD.gn:unit_test,
the .../form_parsing:unit_tests dependency is added twice:
once unconditionally and once for iOS.
The latter is older but now obviously unneeded.
So this CL removes the latter.

Bug: 845426

Change-Id: Iba83449d74cf041369dbced5506d1055f7686e7a
Reviewed-on: https://chromium-review.googlesource.com/1252482Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Commit-Queue: Vaclav Brozek <vabr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595492}

components/password_manager/core/browser/BUILD.gn

@@ -508,11 +508,6 @@ source_set("unit_tests") {
       "//components/safe_browsing/common:safe_browsing_prefs",
     ]
   }
-
-  if (is_ios) {
-    deps +=
-        [ "//components/password_manager/core/browser/form_parsing:unit_tests" ]
-  }
 }
 
 fuzzer_test("csv_reader_fuzzer") {