Build

Remove default arguments on implementation class constructors #754

Job	Run time
🍏 macOS (Clang - Debug)	1m 2s
🍏 macOS (Clang, no validation - Release)	2m 38s
🍏 macOS (Clang, Shared - Release)	2m 5s
🐧 Linux (GCC - Debug)	46s
🐧 Linux (GCC, extra validation - Release)	2m 19s
🐧 Linux (GCC, Shared - Release)	1m 30s
🪟 Windows (MSVC - Debug)	3m 56s
🪟 Windows (MSVC [32-bit] - Debug)	3m 54s
🪟 Windows (MSVC - Release)	4m 7s
🪟 Windows (MSVC, Shared - Release)	3m 51s
	26m 8s

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