gnu: celestia: Remove input labels.

* gnu/packages/astronomy.scm (celestia)[native-inputs, inputs]:
Remove input labels.

Co-authored-by: Tobias Geerinckx-Rice <me@tobias.gr>

gnu/packages/astronomy.scm

@@ -1190,24 +1190,21 @@ any arbitrary astrometric projection defined in the WCS standard.")
                   "00xibg87l1arzifakgj7s828x9pszcgx7x7ij88a561ig49ryh78"))))
       (build-system cmake-build-system)
       (native-inputs
-       `(("perl" ,perl)
-         ("libgit2" ,libgit2)
-         ("pkg-config" ,pkg-config)
-         ("libtool" ,libtool)
-         ("gettext" ,gettext-minimal)))
+       (list gettext-minimal
+             libgit2
+             libtool
+             perl
+             pkg-config))
       (inputs
-       `(("glu" ,glu)
-         ("glew" ,glew)
-         ("libtheora" ,libtheora)
-         ("libjpeg" ,libjpeg-turbo)
-         ("libpng" ,libpng)
-         ;; maybe required?
-         ("mesa" ,mesa)
-         ;; optional: fmtlib, Eigen3;
-         ("fmt" ,fmt-7)
-         ("eigen" ,eigen)
-         ;; glut: for glut interface
-         ("freeglut" ,freeglut)))
+       (list eigen
+             fmt-7
+             freeglut
+             glew
+             glu
+             libjpeg-turbo
+             libpng
+             libtheora
+             mesa))
       (propagated-inputs
        (list lua))
       (arguments
@@ -1224,6 +1221,7 @@ time.  The position and movement of solar system objects is calculated
 accurately in real time at any rate desired.")
       (license license:gpl2+))))
 
+
 (define-public celestia-gtk
   (package/inherit celestia
     (name "celestia-gtk")