gnu: Remove luminance-hdr.

* gnu/packages/image-viewers.scm (luminance-hdr): Delete variable.

Fixes: guix/guix#6234
Change-Id: I27430fb211b67d62bf859f5513ff0953968fae26

gnu/packages/image-viewers.scm

@@ -663,72 +663,6 @@ unicode lower half block element.  It supports JPEG, PNG, GIF, BMP, TIFF
 and WebP.")
     (license license:mpl2.0)))
 
-(define-public luminance-hdr
-  (package
-    (name "luminance-hdr")
-    (version "2.6.1.1")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append
-                    "mirror://sourceforge/qtpfsgui/luminance/"
-                    version "/luminance-hdr-" version ".tar.bz2"))
-              (sha256
-               (base32
-                "18ihaggdp9zwylvk6kwcqii46l1p5s6143c8an2zicpfcb0np2qc"))))
-    (build-system cmake-build-system)
-    (native-inputs
-     (list pkg-config qttools-5))
-    (inputs
-     (list qtbase-5
-           qtdeclarative-5
-           qtsvg-5
-           boost-1.83
-           eigen
-           ;; gtest
-           libraw
-           zlib
-           exiv2
-           libpng
-           libjpeg-turbo
-           lcms
-           openexr-2
-           qtwebengine-5
-           qtdeclarative-5
-           qtwebchannel-5
-           fftwf
-           gsl
-           libtiff))
-    (arguments
-     '(#:tests? #f  ;XXX: some tests fail to compile
-       #:phases
-       (modify-phases %standard-phases
-         (add-after 'set-paths 'add-ilmbase-include-path
-           (lambda* (#:key inputs #:allow-other-keys)
-             ;; 'OpenEXR.pc' has a -I for IlmBase but 'FindOpenEXR.cmake' does
-             ;; not use 'OpenEXR.pc'.  Thus, we need to add
-             ;; "$ilmbase/include/OpenEXR/" to the CPLUS_INCLUDE_PATH.
-             (setenv "CPLUS_INCLUDE_PATH"
-                     (string-append
-                      (dirname
-                       (search-input-file inputs "include/OpenEXR/ImathInt64.h"))
-                      ":" (or (getenv "CPLUS_INCLUDE_PATH") ""))))))))
-    (home-page "https://qtpfsgui.sourceforge.net")
-    (synopsis "High dynamic range (HDR) imaging application")
-    (description
-     "Luminance HDR (formerly QtPFSGui) is a graphical user interface
-application that aims to provide a workflow for high dynamic range (HDR)
-imaging.  It supports several HDR and LDR image formats, and it can:
-
-@itemize
-@item Create an HDR file from a set of images (formats: JPEG, TIFF 8bit and
-16bit, RAW) of the same scene taken at different exposure setting;
-@item Save load HDR images;
-@item Rotate, resize and crop HDR images;
-@item Tone-map HDR images;
-@item Copy EXIF data between sets of images.
-@end itemize\n")
-    (license license:gpl2+)))
-
 ;; CBR and RAR are currently unsupported, due to non-free dependencies.
 (define-public mcomix
   (package