java_interfaces: Moved ifdefs for swig version

Moved the SWIG version check from each sensor library .i file to
the base SWIG .i file (per interface).  This cleans up the number
of #if SWIG_VERSION's across the code base, and will make cleanup
of these easier at a later date.

Signed-off-by: Noel Eck <noel.eck@intel.com>

src/t6713/javaupm_t6713.i

@@ -1,9 +1,7 @@
 %module javaupm_t6713
 %include "../upm.i"
 
-#if SWIG_VERSION >= 0x030009
 %include "../interfaces/javaupm_iCO2Sensor.i"
-#endif
 
 %include "arrays_java.i";
 %include "../java_buffer.i"