How to change a root locus axis label inside another root locus plot?

I'm plotting a root locus where I need to zoom a specific part of it. For this, I'm creating a new axis inside the plot, and them ploting again the root locus, but now within the specified limits of my zoom. I'm trying to remove 'Imaginary Axis (seconds^{-1})' and 'Real Axis (seconds^{-1})' from the innermost plot, since it is the same unit from the outter plot. I've already tried https://www.mathworks.com/matlabcentral/answers/151660-axis-labels-in-root-locus, however, I can only change the outtermost label, not the inner. Here is the code that I'm using:

rlocus(openLoopTransf(1));
title('Root Locus of the System - Analytical Method')

%new axes for the root locus zoom
axes1 = axes('Position',[0.580357142857142 0.161904761904762 0.283928571428571 0.242857142857143]);
rlocus(openLoopTransf(1))
xlabel('Remove Real')
ylabel('Remove Imaginary')
axIm = findall(gcf,'String','Remove Imaginary (seconds^{-1})');
axRe = findall(gcf,'String','Remove Real (seconds^{-1})');
set(axIm,'String','')
set(axRe,'String','')
title('')
xlim(axes1,[-3500 1]);
ylim(axes1,[-1500 1500]);
box(axes1,'on');

The code can find both 'Remove Imaginary (seconds^{-1})' and 'Remove Real (seconds^{-1})', however, set(axIm,'String','') and set(axRe,'String','') aren't making any changes to the axis.

The resulting plot is