PATCH: gh #17275 Silence new warning

PATCH: gh #17275 Silence new warning

This was caused by a static inline function in a header that was
 #included in a file that didn't use it.  Normally, these functions are
 #ifdef'd so as to be visible only to files in which they are used.
 Some compilers warn that the function is defined but not used
 otherwise.  The solution is to remove this function's visibility from
 the file that didn't use it.