jfbview: remove mujs and no-longer-necessary patch

mujs is only required when older versions of mupdf are used, but
we have a more recent one in nixpkgs.

pkgs/os-specific/linux/jfbview/default.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub
-, freetype, harfbuzz, jbig2dec, libjpeg, libX11, mujs, mupdf, ncurses, openjpeg
+, freetype, harfbuzz, jbig2dec, libjpeg, libX11, mupdf, ncurses, openjpeg
 , openssl
 
 , imageSupport ? true, imlib2 ? null }:
@@ -27,16 +27,12 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "format" ];
 
   buildInputs = [
-    freetype harfbuzz jbig2dec libjpeg libX11 mujs mupdf ncurses openjpeg
+    freetype harfbuzz jbig2dec libjpeg libX11 mupdf ncurses openjpeg
     openssl
   ] ++ stdenv.lib.optionals imageSupport [
     imlib2
   ];
 
-  patches = [
-    ./mupdf-1.9.patch
-  ];
-
   configurePhase = ''
     # Hack. Probing (`ldconfig -p`) fails with ‘cannot execute binary file’.
     # Overriding `OPENJP2 =` later works, but makes build output misleading:

pkgs/os-specific/linux/jfbview/mupdf-1.9.patch

@@ -1,28 +0,0 @@
---- JFBView-0.5.2-src/Makefile	2016-06-11 23:27:54.969894750 -0700
-+++ JFBView-0.5.2-src/Makefile	2016-06-11 23:24:45.181142832 -0700
-@@ -134,13 +134,22 @@
- 
- .PHONY: detect_libopenjp2
- detect_libopenjp2:
--	$(eval OPENJP2 = $(shell ldconfig -p | grep -q libopenjp2 && echo 'openjp2' || echo 'openjpeg'))
-+	$(eval OPENJP2 = $(shell echo libopenjp2 | grep -q libopenjp2 && echo 'openjp2'  || echo 'openjpeg'))
- 	@echo "OPENJP2 = $(OPENJP2)" >> $(CONFIG_MK)
- 
- # mupdf_version only depends on -lmupdf.
- mupdf_version: mupdf_version.cpp
--	$(CXX) $(CXXFLAGS) -o $@ $^ $(LDLIBS) -lmupdf
--
-+	$(CXX) $(CXXFLAGS) -o $@ $^ $(LDLIBS) -lmupdf \
-+    -lpthread \
-+    -lform \
-+    -lncurses \
-+    -lfreetype \
-+    -lharfbuzz \
-+    -lz \
-+    -ljbig2dec \
-+    -ljpeg \
-+    -lmujs \
-+    -lopenjp2
- endif
- 
-