[tables] Do not show labels for 'concepttable' environment. (#1589)

Fixes #824.

Author: jensmaurer

source/tables.tex

@@ -161,7 +161,7 @@
 {
  \begin{TableBase}
  \begin{table}[!htb]
- \caption[#1]{\label{tab:#2}#1 \textbf{[#2]}}
+ \caption[#1]{\label{tab:#2}#1}
  \begin{center}
  \begin{tabular}{|#3|}
 }