Fix building with C++14, which errors out due to collisions with internal abs() function.
See also: https://bugs.gentoo.org/show_bug.cgi?id=594372
 
--- a/libGenome/gnDefs.h
+++ b/libGenome/gnDefs.h
@@ -175,13 +175,6 @@
 
 #define CONTIG_SECTION_SIZE 3
 
-// some compilers don't have abs() for 64 bit ints
-#if (defined(__GNUG__) && ( __GNUC__ <= 2 )) || defined(__INTEL_COMPILER) || (defined _MSC_VER && defined __cplusplus)
-
-int64 abs( int64 a );
-
-#endif
-
 #ifdef __cplusplus
 namespace genome {
 #endif
--- a/libGenome/Makefile.am
+++ b/libGenome/Makefile.am
@@ -29,7 +29,7 @@
 gnGenomeSpec.cpp  gnLocation.cpp  \
 gnRAWSource.cpp gnBaseFeature.cpp gnSEQSource.cpp gnSequence.cpp \
 gnContigSpec.cpp gnSourceHeader.cpp gnException.cpp \
-gnFastTranslator.cpp gnPosSpecificTranslator.cpp gnDefs.cpp
+gnFastTranslator.cpp gnPosSpecificTranslator.cpp
 
 library_includedir=$(includedir)/$(GENERIC_LIBRARY_NAME)-$(GENERIC_API_VERSION)/$(GENERIC_LIBRARY_NAME)