Remove NSCopying/NSMutableCopying workarounds in header translator
#2239
| Job | Run time |
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| 4m 37s | |
| 1m 23s | |
| 2m 26s | |
| 34s | |
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| 17s | |
| 7m 19s | |
| 1m 6s | |
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| 1m 3s | |
| 33s | |
| 3m 17s | |
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| 3m 4s | |
| 2m 24s | |
| 1m 56s | |
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| 36m 41s |