This reverts commit 8b561c00.  There are
legitimate cases for osl_loadModule to fail (like when UNO only resorts to
indirect bridging via binary UNO once it has not found a direct bridge
implementation), so this adds too much noise.  (Rather add SAL_WARNs to those
places up the call stack where it is known to be an error, and/or enable
+INFO.sal.osl.)