Remove now-obsolete DWARF parsing support #283

Job	Run time
Test with address sanitizer	4m 37s
Test with leak sanitizer	2m 40s
Benchmark	3m 28s
No-op rebuilds	1m 5s
Lint with clippy	54s
Check generated C header	43s
Check code formatting	19s
Test and coverage	1m 39s
Generate documentation	18s
Build [ubuntu-latest, 1.63.0, dev, ]	1m 1s
Build [ubuntu-latest, 1.63.0, release, ]	1m 12s
Build [ubuntu-latest, stable, dev, ]	20s
Build [ubuntu-latest, stable, release, ]	21s
Build [macos-latest, 1.63.0, dev, ]	1m 30s
Build [macos-latest, 1.63.0, release, ]	1m 57s
Build [macos-latest, stable, dev, ]	52s
Build [macos-latest, stable, release, ]	1m 21s
Build [ubuntu-latest, stable, dev, --no-default-features]	10s
Test with release build	2m 12s
	26m 39s

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