Update doctrine.rst

In 'Deleting an Object' you are not going to delete the entity itself but the given object.
minor #4053 Update doctrine.rst (sr972)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #4053).

Discussion
----------

Update doctrine.rst

| Q             | A
| ------------- | ---
| Doc fix?      | [yes]
| New docs?     | [no]
| Applies to    | [2.3+]

In 'Deleting an Object' you are not going to delete the entity itself but the given object.

Commits
-------

b269ff0 Update doctrine.rst
eraseCredentials method typo
minor #4059 eraseCredentials method typo (danielsan)

This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes #4059).

Discussion
----------

eraseCredentials method typo

Commits
-------

819c588 eraseCredentials method typo
Remove diff info from file.
minor #4068 Remove diff info from cookbook/security/voters.rst (pmartelletti)

This PR was submitted for the 2.5 branch but it was merged into the 2.4 branch instead (closes #4068).

Discussion
----------

Remove diff info from cookbook/security/voters.rst

Commits
-------

3fb678a Remove diff info from file.
Merge branch '2.3' into 2.4

* 2.3:
  eraseCredentials method typo
  Update doctrine.rst
Merge branch '2.4' into 2.5

* 2.4:
  Remove diff info from file.
  eraseCredentials method typo
  Update doctrine.rst
Merge branch '2.5'

* 2.5:
  Remove diff info from file.
  eraseCredentials method typo
  Update doctrine.rst