nixd: omit inherited attrs semantic tokens #2999

Job	Run time
nix-build-develop-clang (none, release, true)	2m 33s
nix-build-develop-gcc (none, release, true)	2m 35s
nix-build-develop-clang (none, release, false)	2m 30s
nix-build-develop-gcc (none, release, false)	2m 52s
nix-build-develop-clang (none, debug, true)	2m 25s
nix-build-develop-gcc (none, debug, true)	2m 36s
nix-build-develop-clang (none, debug, false)	2m 23s
nix-build-develop-gcc (none, debug, false)	2m 32s
nix-build-develop-gcc (address, release, true)	4m 11s
nix-build-develop-gcc (address, release, false)	4m 8s
nix-build-develop-gcc (address, debug, true)	3m 19s
nix-build-develop-gcc (address, debug, false)	3m 22s
nix-build-develop-gcc (undefined, release, true)	3m 44s
nix-build-develop-gcc (undefined, release, false)	3m 47s
nix-build-develop-gcc (undefined, debug, true)	2m 52s
nix-build-develop-gcc (undefined, debug, false)	2m 55s
	48m 44s

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