fix: do not use PBR to get version

Since we have moved to Poetry, and we are using release-please in GH, we
do not need to use anymore pbr, but rather rely on the versions that are
change by the GH action.

Fixes #153

deepaas/__init__.py

@@ -14,6 +14,4 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from deepaas import version
-
-__version__ = version.release_string
+__version__ = "2.3.2"

doc/source/conf.py

@@ -19,7 +19,7 @@
 import os
 import sys
 
-from deepaas import version
+import deepaas
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -68,9 +68,9 @@
 # built documents.
 #
 # The full version, including alpha/beta/rc tags.
-release = version.release_string
+release = deepaas.__version__
 # The short X.Y version.
-version = version.release_string
+version = deepaas.__version__
 
 # A list of glob-style patterns that should be excluded when looking for
 # source files. They are matched against the source file names relative to the