bin/get-pick-list.sh: remove ancient way of nominating patches
bin/get-pick-list.sh: remove ancient way of nominating patches

The old way of nominating patches [NOTE: .*[Cc]andidate] was
deprecated and has been unused for approx. 3 years.

Cc: "13.0 17.0" <59f39c0db42d4479a46b02d4d2bc11120e37bb44@lists.freedesktop.org>
Signed-off-by: Emil Velikov <f20878473f414da183da19ee25c8722cc1d711e4@collabora.com>
Reviewed-by: Eric Engestrom <de0b63cf2dfb1fae8ed3c3b4244856a05677d4f0@imgtec.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler