[core] Remove old JSS v9 animationName property

[merceyz]

• I have followed (at least) the PR section of the contributing guide.

Removed the code that set the animationName property, which is no longer needed

Closes #14763

[mui-pr-bot]

Details of bundle changes.

Comparing: 3f9fa1f...6be5491

bundle	parsed diff	gzip diff	prev parsed	current parsed	prev gzip	current gzip
@material-ui/core	-0.08%	-0.05%	331,368	331,087	90,896	90,849
@material-ui/core/Paper	0.00%	0.00%	69,177	69,177	20,528	20,528
@material-ui/core/Paper.esm	0.00%	0.00%	62,047	62,047	19,208	19,208
@material-ui/core/Popper	0.00%	0.00%	29,182	29,182	10,427	10,427
@material-ui/core/Textarea	0.00%	0.00%	5,759	5,759	2,367	2,367
@material-ui/core/TrapFocus	0.00%	0.00%	3,806	3,806	1,602	1,602
@material-ui/core/styles/createMuiTheme	0.00%	0.00%	16,390	16,390	5,825	5,825
@material-ui/core/useMediaQuery	0.00%	0.00%	3,221	3,221	1,314	1,314
@material-ui/lab	-0.07%	-0.04%	141,987	141,887	43,790	43,771
@material-ui/styles	0.00%	0.00%	51,886	51,886	15,339	15,339
@material-ui/system	0.00%	0.00%	15,761	15,761	4,380	4,380
Button	-0.13%	-0.07%	79,460	79,360	24,301	24,285
Modal	0.00%	0.00%	14,961	14,961	5,221	5,221
Portal	0.00%	0.00%	3,579	3,579	1,566	1,566
Rating	0.00%	0.00%	70,667	70,667	22,064	22,064
Slider	0.00%	0.00%	75,061	75,061	23,277	23,277
colorManipulator	0.00%	0.00%	3,904	3,904	1,543	1,543
docs.landing	0.00%	0.00%	52,056	52,056	13,831	13,831
docs.main	-0.02%	-0.01%	606,828	606,728	194,402	194,389
packages/material-ui/build/umd/material-ui.production.min.js	-0.09%	-0.06%	299,987	299,706	86,202	86,149

Generated by 🚫 dangerJS against 6be5491

[oliviertassinari]

@merceyz Thanks