Remove unnecessary workarounds in test suite for P/Invoke fixed arrays bug.
Remove unnecessary workarounds in test suite for P/Invoke fixed arrays bug.

ktopouzi/CppSharp,zillemarco/CppSharp,inordertotest/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,u255436/CppSharp,u255436/CppSharp,SonyaSa/CppSharp,mono/CppSharp,genuinelucifer/CppSharp,mohtamohit/CppSharp,ktopouzi/CppSharp,u255436/CppSharp,mohtamohit/CppSharp,zillemarco/CppSharp,mydogisbox/CppSharp,mono/CppSharp,inordertotest/CppSharp,u255436/CppSharp,inordertotest/CppSharp,SonyaSa/CppSharp,zillemarco/CppSharp,inordertotest/CppSharp,mohtamohit/CppSharp,zillemarco/CppSharp,SonyaSa/CppSharp,inordertotest/CppSharp,mydogisbox/CppSharp,mono/CppSharp,genuinelucifer/CppSharp,genuinelucifer/CppSharp,ktopouzi/CppSharp,u255436/CppSharp,mydogisbox/CppSharp,mono/CppSharp,mohtamohit/CppSharp,mono/CppSharp,zillemarco/CppSharp,ktopouzi/CppSharp,ktopouzi/CppSharp,mydogisbox/CppSharp,SonyaSa/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,mono/CppSharp,mydogisbox/CppSharp,genuinelucifer/CppSharp,mohtamohit/CppSharp,genuinelucifer/CppSharp,SonyaSa/CppSharp