doc: removing subsections

Author: rbazin

README.md

@@ -105,15 +105,11 @@ View all commands and options:
 uv run era --help
 ```
 
-### Generate weather chart descriptions
-
 Generate a natural language description from a weather chart image:
 ```sh
 uv run era generate --image-path <path_to_image>
 ```
 
-### Evaluate descriptions
-
 Evaluate the accuracy of a description against a weather chart:
 
 ```sh