misc/wmweather+: remove unused dependencies and needless WRKSRC

These LIB_DEPENDS had been added in r78808 (now commit ae9a723b27)
back in 2003 for version 2.4, but neither that nor current version
2.18 show any usage of these libraries.  The build logs and package
contents are also identical, with or without them.

$ egrep -ri 'tiff|hermes|png|gif|jpeg' wmweather+-2.4 weather+-2.18
$ _

Suggested by:	stage Q/A report

misc/wmweather+/Makefile

@@ -17,13 +17,9 @@ LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libcurl.so:ftp/curl \
 		libpcre.so:devel/pcre \
-		libtiff.so:graphics/tiff \
-		libHermes.so:graphics/Hermes \
-		libpng.so:graphics/png \
-		libgif.so:graphics/giflib \
 		libwraster.so:x11-wm/libwraster
 
-USES=		iconv jpeg xorg
+USES=		iconv xorg
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-libwraster=${LOCALBASE} \
 		--with-libpcre=${LOCALBASE} \
@@ -33,8 +29,6 @@ CONFIGURE_ARGS=	--with-libwraster=${LOCALBASE} \
 USE_XORG=	x11 xext xpm sm ice
 LDFLAGS+=	-lm
 
-WRKSRC=		${WRKDIR}/wmweather+-${PORTVERSION}
-
 SUB_FILES=	pkg-message
 
 PLIST_FILES=	bin/${PORTNAME} \