docs: clean up formatting and mkdocs configuration

- Remove empty line from index.md
- Remove index.md from mkdocs.yml sections list

Author: S1M0N38

docs/index.md

@@ -36,7 +36,6 @@ BalatroBot is a Python framework designed to help developers create automated bo
 
     [:octicons-arrow-right-24: Protocol API](protocol-api.md)
 
-
 - :octicons-sparkle-fill-16:{ .lg .middle } __Documentation for LLM__
 
     ---

mkdocs.yml

@@ -39,7 +39,6 @@ plugins:
         The project enables real-time bidirectional communication between the game and bot through TCP sockets.
       sections:
         Documentation:
-          - index.md
           - installation.md
           - developing-bots.md
           - balatrobot-api.md