Remove factory impl test in fork test, which was causing many negativ… #978

Job	Run time
Build contracts and cache output	20s
Build contracts and cache output	10m 6s
Build js package	16s
Build js package	43s
Test coverage - protocol rewards / Check solidity test coverage	24s
Test coverage - protocol rewards / Check solidity test coverage	7m 48s
Test coverage - 1155 / Check solidity test coverage	1m 9s
Test coverage - 1155 / Check solidity test coverage	1m 9s
Fork tests	0s
Fork tests	5m 36s
Inpect storage layout	0s
Inpect storage layout	1m 30s
Tests	0s
Tests	8m 40s
Check contract sizes	0s
Check contract sizes	1m 23s
	39m 4s

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