Issue #2157153 by yched, Berdir: Remove field_attach_preprocess().

core/modules/comment/comment.module

core/modules/field/field.api.php

core/modules/field/field.attach.inc

...les/field/lib/Drupal/field/Tests/FieldAttachOtherTest.php

core/modules/node/node.module

core/modules/taxonomy/taxonomy.module

core/modules/user/user.pages.inc