Remove unnecessary references to gcc5

These cause an unnecessary rebuild of gcc.

pkgs/applications/audio/i-score/default.nix

@@ -3,7 +3,7 @@
   cln,
   cmake,
   fetchgit,
-  gcc5,
+  gcc,
   ginac,
   jamomacore,
   kde5,
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
     cln
     cmake
     ginac
-    gcc5
+    gcc
     jamomacore
     kde5.kdnssd
     libsndfile

pkgs/development/tools/build-managers/icmake/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, gcc5 }:
+{ stdenv, fetchFromGitHub, gcc }:
 
 stdenv.mkDerivation rec {
   name = "icmake-${version}";
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   sourceRoot = "icmake-${version}-src/icmake";
 
-  buildInputs = [ gcc5 ];
+  buildInputs = [ gcc ];
 
   preConfigure = ''
     patchShebangs ./

pkgs/misc/emulators/dolphin-emu/master.nix

@@ -1,4 +1,4 @@
-{ stdenv, gcc5, pkgconfig, cmake, bluez, ffmpeg, libao, mesa, gtk2, glib
+{ stdenv, gcc, pkgconfig, cmake, bluez, ffmpeg, libao, mesa, gtk2, glib
 , gettext, git, libpthreadstubs, libXrandr, libXext, readline
 , openal, libXdmcp, portaudio, fetchgit, libusb, libevdev
 , libpulseaudio ? null }:
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  buildInputs = [ gcc5 pkgconfig cmake bluez ffmpeg libao mesa gtk2 glib
+  buildInputs = [ gcc pkgconfig cmake bluez ffmpeg libao mesa gtk2 glib
                   gettext libpthreadstubs libXrandr libXext readline openal
                   libevdev git libXdmcp portaudio libusb libpulseaudio ];