gallium/docs: remove old llvmpipe TODO

Features are already covered by features.txt like all the other
drivers.

Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

docs/helpwanted.html

@@ -66,8 +66,6 @@ You can find some further To-do lists here:
 <b>Driver specific To-Do lists:</b>
 </p>
 <ul>
-  <li><a href="https://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/docs/llvm-todo.txt">
-    <b>LLVMpipe</b></a> - Software driver using LLVM for runtime code generation.</li>
   <li><a href="https://dri.freedesktop.org/wiki/RadeonsiToDo">
     <b>radeonsi</b></a> - Driver for AMD Southern Island.</li>
   <li><a href="https://dri.freedesktop.org/wiki/R600ToDo">

src/gallium/docs/llvm-todo.txt

@@ -1,14 +0,0 @@
-TODO covering gallivm/llvmpipe
-==============================
-
-Goal: GL3.0 support in llvmpipe
--------------------------------
-
-EXT_packed_float support.
-ARB_depth_buffer_float support.
-EXT_framebuffer_sRGB support.
-MSAA support.
-
-Goal: extension parity with softpipe:
--------------------------------------
-