devel/py-cbor: No longer cater to GCC 4.2

Remove code catering to GCC 4.2 (as system compiler) which is not
necessary any longer since USES=compiler and USE_GCC never will pull
that in anymore.

This reverts much of commits 029e8b8
and a00547a from 3+ years ago.

Approved by:	sunpoet (maintainer)

devel/py-cbor/Makefile

@@ -13,14 +13,7 @@ LICENSE=	APACHE20
 USES=		compiler python:3.6+
 USE_PYTHON=	autoplist concurrent distutils
 
-.include <bsd.port.pre.mk>
-
-.if ${CHOSEN_COMPILER_TYPE} == gcc && ${COMPILER_VERSION} <= 42
-post-patch:
-	@${REINPLACE_CMD} -e '/pragma/d' ${WRKSRC}/c/cbormodule.c
-.endif
-
 post-install:
 	${FIND} ${STAGEDIR}${PYTHON_SITELIBDIR} -name '*.so' -exec ${STRIP_CMD} {} +
 
-.include <bsd.port.post.mk>
+.include <bsd.port.mk>