Revert "DTLS server quick connection fix (#38)"

[j1elo]

Reverts #38

Reason: Code compiles but linker fails:

[ 40%] Linking C shared library libkmswebrtcendpointlib.so
CMakeFiles/kmswebrtcendpointlib.dir/kmswebrtctransportsink.c.o: In function `gst_bin_iterate_all_by_element_factory_name':
./src/gst-plugins/webrtcendpoint/./src/gst-plugins/webrtcendpoint/kmswebrtctransportsink.c:59: multiple definition of `gst_bin_iterate_all_by_element_factory_name'
CMakeFiles/kmswebrtcendpointlib.dir/kmswebrtctransportsrc.c.o:./src/gst-plugins/webrtcendpoint/./src/gst-plugins/webrtcendpoint/kmswebrtctransportsrc.c:57: first defined here
collect2: error: ld returned 1 exit status