Remove dead link to label matching semantics document (#2205)
Remove dead link to label matching semantics document (#2205)

Signed-off-by: Julius Volz <d7748b1e6f41fd74500c5ccae0980eab88c2ef61@gmail.com>

Signed-off-by: Julius Volz <d7748b1e6f41fd74500c5ccae0980eab88c2ef61@gmail.com>
prometheus/docs,prometheus/docs,prometheus/docs