Remove hardcoded paths from .desktop, not replacing with
make_desktop_entry given upstream's also defines MimeType.
--- a/fceux.desktop
+++ b/fceux.desktop
@@ -7,4 +7,4 @@
 Comment=Emulate NES ROMs
-Exec=/usr/bin/fceux %f
-Icon=/usr/share/pixmaps/fceux1.png
+Exec=fceux %f
+Icon=fceux1
 Terminal=false
@@ -17,3 +17,2 @@
 Exec=fceux -f 1
-OnlyShowIn=Unity
 [Desktop Action DefaultConfig]
@@ -21,2 +20 @@
 Exec=fceux --no-config 1
-OnlyShowIn=Unity