cleanup: get rid of redundant assignments 'foo = foo'

Redundant assignments were searched with:

    grep '^ *\(.*\) = \1$' `hg files`

Some of these cases have resulted from earlier cleanup, like:

    foo = safe_unicode(foo)

and later batch removing safe_unicode usage. See e.g. commit
e35373106528b29461b7f5144780cb9ec79f765d .


Note: two false positives occur:

kallithea/tests/models/test_settings.py:39:
        setting.app_settings_value = setting.app_settings_value
kallithea/tests/models/test_settings.py:42:
        setting.app_settings_value = setting.app_settings_value

which is not a plain assignment but where 'app_settings_value' is a property
method with side effects.

kallithea/controllers/api/api.py

@@ -1143,7 +1143,6 b' class ApiController(JSONRPCController):'
             if not HasRepoPermissionLevel('read')(repo.repo_name):
                 raise JSONRPCError('repository `%s` does not exist' % (repoid,))
 
-        ret_type = ret_type
         _map = {}
         try:
             _d, _f = ScmModel().get_nodes(repo, revision, root_path,

kallithea/model/repo.py

@@ -321,8 +321,6 b' class RepoModel(object):'
         fork_of = db.Repository.guess_instance(fork_of)
         repo_group = db.RepoGroup.guess_instance(repo_group)
         try:
-            repo_name = repo_name
-            description = description
             # repo name is just a name of repository
             # while repo_name_full is a full qualified name that is combined
             # with name and path of group

kallithea/model/scm.py

@@ -451,7 +451,6 b' class ScmModel(object):'
                 content = content.read()
             processed_nodes.append((f_path, content))
 
-        message = message
         committer = user.full_contact
         if not author:
             author = committer
@@ -493,7 +492,6 b' class ScmModel(object):'
         user = db.User.guess_instance(user)
         scm_instance = repo.scm_instance_no_cache()
 
-        message = message
         committer = user.full_contact
         if not author:
             author = committer
@@ -572,7 +570,6 b' class ScmModel(object):'
             content = nodes[f_path].get('content')
             processed_nodes.append((f_path, content))
 
-        message = message
         committer = user.full_contact
         if not author:
             author = committer

kallithea/tests/scripts/manual_test_crawler.py

@@ -83,7 +83,6 b' urllib.request.install_opener(o)'
 def _get_repo(proj):
     if isinstance(proj, str):
         repo = vcs.get_repo(os.path.join(PROJECT_PATH, proj))
-        proj = proj
     else:
         repo = proj
         proj = repo.name