remove redundant example directory #24

Job	Run time
Julia 1.6 - ubuntu-latest - x64 - push	2m 32s
Julia 1.6 - ubuntu-latest - x86 - push	4m 42s
Julia 1.6 - macOS-latest - x64 - push	4m 59s
Julia 1.6 - windows-latest - x64 - push	11m 5s
Julia 1.6 - windows-latest - x86 - push	12m 18s
Julia 1.9 - ubuntu-latest - x64 - push	2m 16s
Julia 1.9 - ubuntu-latest - x86 - push	3m 24s
Julia 1.9 - macOS-latest - x64 - push	3m 17s
Julia 1.9 - windows-latest - x64 - push	3m 41s
Julia 1.9 - windows-latest - x86 - push	5m 9s
Julia nightly - ubuntu-latest - x64 - push	3m 32s
Julia nightly - ubuntu-latest - x86 - push	4m 38s
Julia nightly - macOS-latest - x64 - push	4m 57s
Julia nightly - windows-latest - x64 - push	4m 25s
Julia nightly - windows-latest - x86 - push	6m 13s
	1h 17m 8s

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