removed dead function

"vtkCosmicTreeLayoutStrategyComputeCentersWell" appears
nowhere else in the codebase.

Fixes -Wunused-function warning that started after
the function was recently made static.

Change-Id: I2d68e933e1e7ea75dde9e21cf0e20584f5c58e17
Silence warning by toggling an "#if 1"

printOglError() is unused, but likely meant to be used
when developing/debugging.

Fixes -Wunused-function warning that started after
the function was recently made static.

Change-Id: I2958a48108bc0225743388e9e82c010e4fa45411
Merge topic 'warning-regression' into master

a232f0fb Silence warning by toggling an "#if 1"
f75823b8 removed dead function