DOC: Removed empty sections from the changelog.

CHANGELOG.md

@@ -47,27 +47,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added additional customization options to the plantuml module.
 - The to_graphics function in the plantuml module uses a temporary directory now for creating the output files.
 
-### Deprecated ###
-
-### Removed ###
-
 ### Fixed ###
 
 * [#75](https://gitlab.indiscale.com/caosdb/src/caosdb-pylib/-/issues/75), [#103](https://gitlab.indiscale.com/caosdb/src/caosdb-pylib/-/issues/103) Fixed JSON schema to allow more sections, and correct requirements for
   password method.
 
-### Security ###
-
-### Documentation ###
-
-
 ## [0.7.2] - 2022-03-25 ##
 (Timm Fitschen)
 
-### Added ###
-
-### Changed ###
-
 ### Deprecated ###
 
 * In module `caosdb.apiutils`:
@@ -75,8 +62,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   * `convert_to_entity` function
   * `convert_to_python_object` function
 
-### Removed ###
-
 ### Fixed ###
 
 * [caosdb-pylib#106](https://gitlab.indiscale.com/caosdb/src/caosdb-pylib/-/issues/106)
@@ -84,8 +69,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   unintentional revocation of permissions for some users or roles during
   updates. However, no additional permissions are being granted.
 
-### Security ###
-
 ### Documentation ###
 
 ## [0.7.1] - 2022-03-11 ##
@@ -151,8 +134,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   * `yaml_file_to_xml`
   * `insert_yaml_file`
 
-### Removed ###
-
 ### Fixed ###
 
 * #60 Unintuitive behavior of `Entity.role` after a `Entity(id).retrieve()`
@@ -177,10 +158,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Updated error-handling tutorial in documentation to reflect the new
   error classes
 
-### Deprecated ###
-
-### Removed ###
-
 ### Fixed ###
 * #45 - test_config_ini_via_envvar
 
@@ -273,14 +250,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   assumed that `password_method` is `auth_token` if the the `auth_token` is
   set.
 
-### Removed ###
-
 ### Fixed ###
 
 - Replaced deprecated Logger.warn() method.
 
-### Security ###
-
 ## [0.3.0] - 2020-04-24##
 
 ### Added ###
@@ -288,10 +261,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * `apiutils.apply_to_ids` -- a helper which applies a function to all ids which
   are used by an entity (own entity, parents, properties, references etc.).
 
-### Changed ###
-
-### Deprecated ###
-
 ### Fixed ###
 
 * import bugs in apiutils