Remove `SBF_JMP32` instruction class #212

Job	Run time
abi-dump-setup	50s
Test lld / Lit Tests (ubuntu-latest)	11m 0s
Build lldb / Lit Tests (ubuntu-latest)	26m 31s
Test llvm,clang,libclc / Lit Tests (ubuntu-latest)	47m 8s
Test lld / Lit Tests (windows-2019)	1m 21s
Build lldb / Lit Tests (windows-2019)	1m 43s
Test llvm,clang,libclc / Lit Tests (windows-2019)	1m 19s
Test lld / Lit Tests (macOS-latest)	1h 20m 57s
Build lldb / Lit Tests (macOS-latest)	2h 7m 5s
Test llvm,clang,libclc / Lit Tests (macOS-latest)	3h 58m 31s
abi-dump (build-baseline)	30m 19s
abi-dump (build-latest)	31m 16s
abi-compare	31s
	9h 58m 31s

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