Update task categories

Removed the following categories due to inconsistencies with the submitted dataset:
- table-question-answering (please refer to the link for more details on what is a task of table question answering: https://huggingface.co/tasks/table-question-answering)
- audio-classification (no audio files were provided)
- reinforcement-learning (see the link: https://huggingface.co/tasks/reinforcement-learning)
- summarization (see the link: https://huggingface.co/tasks/summarization)
- text-classification (see the link: https://huggingface.co/tasks/text-classification)

README.md

@@ -2,13 +2,6 @@
 license: bsd
 task_categories:
 - feature-extraction
-- text-classification
-- summarization
-- table-question-answering
-- text-classification 
-- feature-extraction
-- audio-classification 
-- reinforcement-learning
 - tabular-classification
 - tabular-regression
 language: