servo: Merge #19381 - Revert "Add clang packages for non-debian linuxes." (from emilio:sync-service-broken); r=emilio

This reverts commit 1d2456e076249c85dbaa1e1d9c28204b173f0cb8, in an attempt to
restore the sync state across repos. Will reland if this fixes it (and if it
doesn't too).

Source-Repo: https://github.com/servo/servo
Source-Revision: a8c7940ea38157bc4dfc2c1f0c9bc2e9852baeeb

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 6c7b49f0306510ee20bb9b361d17217e7de7242b

servo/README.md

@@ -75,7 +75,7 @@ sudo dnf install curl freeglut-devel libtool gcc-c++ libXi-devel \
     freetype-devel mesa-libGL-devel mesa-libEGL-devel glib2-devel libX11-devel libXrandr-devel gperf \
     fontconfig-devel cabextract ttmkfdir python python-virtualenv python-pip expat-devel \
     rpm-build openssl-devel cmake bzip2-devel libXcursor-devel libXmu-devel mesa-libOSMesa-devel \
-    dbus-devel ncurses-devel pulseaudio-libs-devel clang clang-libs
+    dbus-devel ncurses-devel pulseaudio-libs-devel
 ```
 #### On CentOS
 
@@ -84,7 +84,7 @@ sudo yum install curl freeglut-devel libtool gcc-c++ libXi-devel \
     freetype-devel mesa-libGL-devel mesa-libEGL-devel glib2-devel libX11-devel libXrandr-devel gperf \
     fontconfig-devel cabextract ttmkfdir python python-virtualenv python-pip expat-devel \
     rpm-build openssl-devel cmake bzip2-devel libXcursor-devel libXmu-devel mesa-libOSMesa-devel \
-    dbus-devel ncurses-devel python34 pulseaudio-libs-devel clang clang-libs
+    dbus-devel ncurses-devel python34 pulseaudio-libs-devel
 ```
 
 #### On openSUSE Linux
@@ -92,7 +92,7 @@ sudo yum install curl freeglut-devel libtool gcc-c++ libXi-devel \
 sudo zypper install libX11-devel libexpat-devel libbz2-devel Mesa-libEGL-devel Mesa-libGL-devel cabextract cmake \
     dbus-1-devel fontconfig-devel freetype-devel gcc-c++ git glib2-devel gperf \
     harfbuzz-devel libOSMesa-devel libXcursor-devel libXi-devel libXmu-devel libXrandr-devel libopenssl-devel \
-    python-pip python-virtualenv rpm-build glu-devel llvm-clang libclang
+    python-pip python-virtualenv rpm-build glu-devel
 ```
 #### On Arch Linux