[PM-14245] Remove policy definitions feature flag #30925

Job	Run time
Check PR run / Check	3s
Verify Electron Version	6s
Setup	4s
Linux Build	11m 16s
MacOS Build	3m 20s
Windows Build	13m 23s
Browser Build / Check PR run / Check	1s
Browser Build / Setup	6s
Browser Build / Locales Test	7s
Browser Build / Build Safari	6m 51s
Browser Build / Build	23m 25s
Browser Build / Crowdin Push	0s
Browser Build / Check for failures	16s
MacOS Package Prod Release Asset	8m 32s
MacOS Package GitHub Release Assets	10m 37s
MacOS Package Dev Release Asset	5m 54s
Crowdin Push	36s
Check for failures	17s
	1h 24m 54s

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