remove libz as dependency. For some reason opencv needs it when compiling as static lib.
remove libz as dependency. For some reason opencv needs it when compiling as static lib.

When compiling as dll (-DBUILD_WITH_STATIC_CRT:BOOL="1" -DBUILD_SHARED_LIBS:BOOL="1") it does not need it to compile and run. In that case opencv creates import libs, confusingly called .lib and dlls.

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