Revert "private-lib-core-net.h contains symbols for threadpool apis : lws_threadpool_wsi_closing & lws_threadpool_tsi_context"
Revert "private-lib-core-net.h contains symbols for threadpool apis : lws_threadpool_wsi_closing & lws_threadpool_tsi_context"

This reverts commit f9bb6c7b7b644ea489334f06c4a463f0e9f7ed82.

awslabs/amazon-kinesis-video-streams-webrtc-sdk-c,awslabs/amazon-kinesis-video-streams-webrtc-sdk-c,awslabs/amazon-kinesis-video-streams-webrtc-sdk-c,awslabs/amazon-kinesis-video-streams-webrtc-sdk-c