Remove obsolete Conda configuration #746

Job	Run time
gst-web image build & publish	24s
py-build image build & publish	48s
conda image build & publish	6m 32s
coturn image build & publish	24s
coturn-web image build & publish	6m 34s
gstreamer-ubuntu20.04 image build & publish	6m 15s
gstreamer-ubuntu22.04 image build & publish	6m 21s
gstreamer-ubuntu24.04 image build & publish	6m 22s
js-interposer-ubuntu20.04 image build & publish	2m 7s
js-interposer-ubuntu22.04 image build & publish	1m 49s
js-interposer-ubuntu24.04 image build & publish	4m 43s
turn-rest image build & publish	45s
infra-gcp-installer image build & publish	37s
${{ matrix.name }}${{ matrix.version_suffix }}${{ matrix.suffix }}_${{ matrix.platforms \|\| 'linux/amd64' }} build artifact extraction & upload	0s
${{ matrix.name }}${{ matrix.version_suffix }} image build & publish	0s
	43m 41s

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