Get rid of unused variable.

Change-Id: I1b51872e5330722c514a553e571b2eeb56fbade7
Reviewed-on: https://code.wireshark.org/review/27063
Reviewed-by: Guy Harris <guy@alum.mit.edu>

CMakeLists.txt

@@ -1081,7 +1081,6 @@ foreach(PACKAGE ${PACKAGELIST})
 			message(STATUS "${PACKAGE} includes: ${${PACKAGE_VAR}_INCLUDE_DIRS}")
 		endif()
 		if (${PACKAGE_VAR}_LIBRARIES)
-			list(APPEND WS_ALL_LIBS ${${PACKAGE_VAR}_LIBRARIES})
 			message(STATUS "${PACKAGE} libs: ${${PACKAGE_VAR}_LIBRARIES}")
 		endif()
 		if (${PACKAGE_VAR}_DEFINITIONS)