Global variable 'Old_SW_VegProd' unused -- do we still need it?

[dschlaep]

• Global variable 'Old_SW_VegProd' was introduced by commit 12a99e8 (three years ago).

• Function SW_VPD_read() sets it as copy of SW_VegProd.

• It is not used by any code by SOILWAT2. Does this variable have any (hidden) need to exist? If not, can we delete it? @ashishtiwari2006 @BrendenBe1 @kpalmqui

[BrendenBe1]

It seems like it serves no purpose. I commented it out and ran STEPWAT and SOILWAT standalone and noticed no difference in output and no errors occured.

[kpalmqui]

I concur - we can delete it.

[dschlaep]

Thanks for checking!