Fix Project API docs

Author: aversey

python/hopsworks/core/project_api.py

@@ -28,8 +28,6 @@ def _exists(self, name: str):
             name: Name of the project.
         # Returns
             `bool`: True if project exists, otherwise False
-        # Raises
-            `RestAPIError`: If unable to check the existence of the project
         """
         try:
             self._get_project(name)