I’m trying to remove a rule from my multirow table:
\begin{table}[ht]
\centering
\begin{tabular}{@{}cl|cll@{}}
& & \multicolumn{3}{c}{\textsc{Columns}} \\
& & A & B & C \\ \cmidrule(l){3-5}
\multirow{3}{*}{\rotatebox[origin=c]{90}{\textsc{Rows}}}
& 1 & A1 & B1 & C1 \\
& 2 & A2 & B2 & C2 \\
& 3 & A3 & B3 & C3 \\
\end{tabular}
\caption{Caption}
\label{tab:my-table}
\end{table}
The output looks like so:
However, I’m unable to remove this top small unnecessary vertical line (the vertical line left of Columns and A B C).
So I only try to achieve a vertical line that captures the Rows 1, 2, and 3.
Any ideas? thanks!

