Revised the Read the Docs configuration, and removed the redundant requirements.txt for Read the Docs.

.readthedocs.yaml

@@ -29,14 +29,12 @@ build:
     python: "3.11"
 
 # Build documentation in the docs/ directory with Sphinx
-sphinx:
-   configuration: docs/source/conf.py
 
 # If using Sphinx, optionally build your docs in additional formats such as PDF
-# formats:
-#    - pdf
+formats: all
 
 # Optionally declare the Python requirements required to build your docs
 python:
    install:
-   - requirements: docs/requirements.txt
+   - method: pip
+     path: .