Drop references to $haikuVersion.

* Referring the current haiku version explicitly is not needed, since
  the RequiresUpdater takes care of setting the version of Haiku used
  for building a package.

media-libs/tiff/tiff4-4.0.3.recipe

@@ -20,7 +20,7 @@ PROVIDES="
 	lib:libtiffxx$secondaryArchSuffix = 5.2.0 compat >= 5
 	"
 REQUIRES="
-	haiku$secondaryArchSuffix >= $haikuVersion
+	haiku$secondaryArchSuffix
 	lib:libGL$secondaryArchSuffix
 	lib:libjpeg$secondaryArchSuffix
 	lib:libz$secondaryArchSuffix
@@ -32,7 +32,7 @@ BUILD_REQUIRES="
 	devel:libz$secondaryArchSuffix
 	"
 BUILD_PREREQUIRES="
-	haiku${secondaryArchSuffix}_devel >= $haikuVersion
+	haiku${secondaryArchSuffix}_devel
 	cmd:aclocal
 	cmd:autoconf
 	cmd:automake
@@ -133,7 +133,7 @@ if [ -z "$secondaryArchSuffix" ]; then
 		cmd:tiffsplit
 		"
 	REQUIRES_tools="
-		haiku >= $haikuVersion
+		haiku
 		tiff4 == $portVersion base
 		lib:libjpeg
 		lib:libz