refactor: move constants to git_flow module

src/git_flow/command/init.py

@@ -1,7 +1,7 @@
 import typer
 
-from git_flow import GitFlowError
-from git_flow.git import FLOWCONFIG_FILE, Git
+from git_flow import FLOWCONFIG_FILENAME, GitFlowError
+from git_flow.git import Git
 from git_flow.command.base import *
 
 app = typer.Typer()
@@ -25,8 +25,8 @@ def init():
     if remote:
         flowconfig["flow.remote"] = remote
 
-    Git.set_config(flowconfig, FLOWCONFIG_FILE)
-    Git("add", FLOWCONFIG_FILE).exec()
+    Git.set_config(flowconfig, FLOWCONFIG_FILENAME)
+    Git("add", FLOWCONFIG_FILENAME).exec()
     Git("commit", message="feature: initialize git-flow").exec()
 
     _ensure_all_flow_branches_exist(branches, remote)
@@ -43,7 +43,6 @@ def _ensure_is_repository():
 
 
 def _ensure_not_already_initialized():
-    flowconfig = get_config()
     if not flowconfig:
         return
     elif flowconfig.get("flow.initialized") == "true":