dict cleanups #2073

Job	Run time
linux-byo-crypto	2m 36s
linux-compat (manylinux1-x64)	5m 35s
linux-compat (manylinux1-x86)	8m 41s
linux-compat (manylinux2014-x64)	5m 54s
linux-compat (manylinux2014-x86)	6m 26s
linux-compat (fedora-34-x64)	6m 7s
linux-compat (opensuse-leap)	6m 14s
linux-compat (rhel8-x64)	6m 23s
clang-sanitizers (,thread)	6m 56s
linux-compat (al2-x64)	5m 48s
clang-sanitizers (,address,undefined)	6m 27s
downstream	40m 35s
linux-compiler-compat (clang-3)	6m 18s
windows	4m 3s
linux-shared-libs	6m 30s
linux-compiler-compat (clang-6)	6m 15s
linux-compiler-compat (clang-8)	6m 44s
linux-compiler-compat (clang-9)	7m 14s
freebsd	6m 39s
openbsd	10m 20s
linux-compiler-compat (clang-10)	6m 31s
linux-compiler-compat (clang-11)	6m 28s
osx	1m 32s
linux-compiler-compat (gcc-4.8)	6m 11s
windows-app-verifier	4m 43s
linux-compiler-compat (gcc-5)	6m 36s
linux-compiler-compat (gcc-6)	6m 42s
windows-shared-libs	4m 13s
linux-compiler-compat (gcc-7)	6m 10s
windows-vc14 (x86)	3m 38s
linux-compiler-compat (gcc-8)	6m 41s
windows-vc14 (x64)	4m 24s
	3h 45m 34s

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