12 calls to db_drop_field()

block_update_8008 in drupal/core/modules/block/block.install
Migrate {block_custom}.body and {block_custom}.format to block_body field.
locale_update_8000 in drupal/core/modules/locale/locale.install
Drops textgroup support.
locale_update_8005 in drupal/core/modules/locale/locale.install
Update plural interface translations to new format.
locale_update_8014 in drupal/core/modules/locale/locale.install
Drop old 'location' field.
node_update_8018 in drupal/core/modules/node/node.install
Upgrade node schema to the standard entity SQL schema: delete old fields.
SchemaTest::assertFieldAdditionRemoval in drupal/core/modules/system/lib/Drupal/system/Tests/Database/SchemaTest.php
Asserts that a given field can be added and removed from a table.
SchemaTest::assertFieldCharacteristics in drupal/core/modules/system/lib/Drupal/system/Tests/Database/SchemaTest.php
Asserts that a newly added field has the correct characteristics.
system_update_8005 in drupal/core/modules/system/system.install
Remove the obsolete {session}.cache column.
taxonomy_update_8000 in drupal/core/modules/taxonomy/taxonomy.install
Remove the {taxonomy_vocabulary}.module field.
update_prepare_d8_language in drupal/core/includes/update.inc
Prepares Drupal 8 language changes for the bootstrap if needed.
user_update_8013 in drupal/core/modules/user/user.install
Deletes {users}.picture field.
user_update_8016 in drupal/core/modules/user/user.install
Drop {users}.data column.