gnu: Remove binutils-vc4.

* gnu/packages/embedded.scm (binutils-vc4): Delete variable.

Fixes: guix/guix#2103
Change-Id: I126622cfd2688ffb6d1f74169dbd53dfdb155082

gnu: Remove vte/gtk+-2.

* gnu/packages/gnome.scm (vte/gtk+-2): Delete variable.

Change-Id: I78c8866695474f1333b705e82ac4df961b76c7ca

gnu: Remove gnurobots.

* gnu/packages/games.scm (gnurobots): Delete variable.

Fixes: guix/guix#2102
Change-Id: I6ccdebbb48980cc03de05413b5058be0b92da73d

gnu: Remove llvm-6.

* gnu/packages/llvm.scm (llvm-6): Delete variable.

Change-Id: I53839e5d7bfe560458628fb2c4c42bd6c2d0566d

gnu: Remove llvm-3.8.

* gnu/packages/llvm.scm (llvm-3.8): Delete variable.
* gnu/packages/patches/llvm-3.x.1-fix-build-with-gcc.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Unregister file.

Fixes: guix/guix#2101
Change-Id: I71cee0723420fb7f928c0d1c747a3bf4424fa344

gnu: Remove extempore.

* gnu/packages/music.scm (extempore): Delete variable.

Change-Id: Ifd801d299c429f01dc20c1e0292243c7f7a6fb43

gnu: Unregister deleted file.

This is a follow-up to commit 3dc53ee3e70bd109978548bd43f26386f5c93582.

* gnu/packages/llvm.scm (dist_patch_DATA): Really unregister
gnu/packages/patches/llvm-3.5-fix-clang-build-with-gcc5.patch.

Change-Id: Ib49c1b506decfa1c5b0b11947964cfc9af2b61b6

gnu: Remove llvm-3.5.

* gnu/packages/llvm.scm (llvm-3.5): Delete variable.
* gnu/packages/patches/llvm-3.5-fix-clang-build-with-gcc5.patch:
Delete file.
* gnu/packages/llvm.scm (dist_patch_DATA): Unregister file.

Fixes: guix/guix#2100
Change-Id: I60dffaa5eb7f662994daefa84cd49dac5243c4c4

gnu: Remove (gnu packages pure).

* gnu/packages/pure.scm: Delete file.
* gnu/local.mk (GNU_SYSTEM_MODULES), po/packages/POTFILES.in: Unregister
file.

Change-Id: Ifaf95459e662d291cd5276f9c4b9bf904f5041c6

gnu: Remove pure.

* gnu/packages/pure.scm (pure): Delete variable.

Change-Id: Id6cc15587de7aa48f239a7049117000495fb0b50

gnu: Remove llvm-3.7.

* gnu/packages/llvm.scm (llvm-3.7): Delete variable.

Fixes: guix/guix#2099
Change-Id: I912b8ae8f33a63bad2becbdc1fbd5cf42e93f913

gnu: llvm-3.5: Remove inheritance from llvm-3.7.

* gnu/packages/llvm.scm (llvm-3.5)[inherit]: Replace llvm-3.7 by llvm-6.
[outputs, arguments]: Copy-paste from llvm-3.7.

Change-Id: Ic1743867ad5eec6fd6d3a806ddc3ba9e3539ab11

gnu: Remove unused patch.

This is a follow-up to commit 2c4acd05d4f2fe6c2241ea24640af92cd64b6dd9.

* gnu/packages/patches/clang-3.8-libc-search-path.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Unregister file.

Change-Id: I402f01f1fa442f71b3a0b8c67faa38ae76ac8d6e

gnu: Remove clang-3.7.

* gnu/packages/llvm.scm (clang-3.7): Delete variable.
* gnu/packages/patches/clang-3.5-libc-search-path.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Unregister file.

Change-Id: Iacf6b9a8f7a70526ffadfdbd1a587d81fae1967f

gnu: Remove clang-runtime-3.7.

* gnu/packages/llvm.scm (clang-runtime-3.7): Delete variable.
* gnu/packages/patches/clang-3.5-libsanitizer-ustat-fix.patch,
gnu/packages/patches/clang-runtime-3.7-fix-build-with-python3.patch,
gnu/packages/patches/clang-runtime-3.8-libsanitizer-mode-field.patch,
gnu/packages/patches/clang-runtime-asan-build-fixes.patch: Remove files.
* gnu/local.mk (dist_patch_DATA): Unregister files.

Change-Id: I848b09d29585217b0cc3d2f9ac1867e8ee5e853c

gnu: Remove beignet.

* gnu/packages/opencl.scm (beignet): Delete variable.

Change-Id: Iddbed6ef2057fe39c88df6862644dfe0e2b18a44

gnu: Remove latte-dock.

* gnu/packages/kde-plasma.scm (latte-dock): Delete variable.

Fixes: guix/guix#2090
Change-Id: Id8d92cf9286417f25e1d1f52a8e1429a10610f99

gnu: Remove choqok.

* gnu/packages/kde-internet.scm (choqok): Delete variable.

Fixes: guix/guix#2089
Change-Id: I57a7af5eb840c6b07fdbe67f706592f585a30f30

gnu: Remove python-pillow-2.9.

* gnu/packages/python-xyz.scm (python-pillow-2.9): Delete variable.

Fixes: guix/guix#2086
Change-Id: I4ef66bff3aeeab8027d00a6685eeb32ad314720b

gnu: Remove (gnu packages presentation).

* gnu/packages/presentation.scm: Delete file.
* gnu/local.mk (GNU_SYSTEM_MODULES), po/packages/POTFILES.in: Unregister
file.

Change-Id: I43b5ed8409bc79d84b929d9f00f57ab7ae9d4889