refactor: refactor unnecessary else / elif when if block has a raise statement

`raise` causes control flow to be disrupted, as it will exit the block.
It is recommended to check other conditions using another `if` statement, and get rid of `else` statements as they are unnecessary.

lynxie/utils.py

@@ -63,7 +63,7 @@ def get_env_or_error(env: str) -> str:
 
     if from_file is None and from_env is None:
         raise KeyError(f"Environment variable {env} not found")
-    elif from_file is None:
+    if from_file is None:
         return from_env
     else:
         return from_file