remove disable-gpu flag for all targets #489

Job	Run time
Rustfmt	12s
Tests (ubuntu-latest)	2m 5s
Tests (windows-latest)	3m 38s
Tests (macos-latest)	2m 24s
semver	43s
Build Wasm Examples (wasm-yew-minimal)	49s
Build Examples (3d_charts)	23s
Build Examples (basic_charts)	24s
Build Examples (custom_controls)	27s
Clippy	3m 12s
Code Coverage	9s
Build Examples (financial_charts)	22s
Build Examples (images)	36s
Build Examples (kaleido)	1m 33s
Build Examples (maps)	22s
Build Examples (ndarray)	26s
Build Examples (scientific_charts)	23s
Build Examples (shapes)	24s
Build Examples (subplots)	21s
	18m 53s

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