DOCS remove duplicate text (#23149)

davidgilbertson · web-flow · commit c0594bc97450 · 2022-05-27T10:16:01.000+02:00
* Update _axes.py

* Update _axes.py
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -7451,8 +7451,7 @@ def cohere(self, x, y, NFFT=256, Fs=2, Fc=0, detrend=mlab.detrend_none,
         r"""
         Plot the coherence between *x* and *y*.
 
-        Plot the coherence between *x* and *y*.  Coherence is the
-        normalized cross spectral density:
+        Coherence is the normalized cross spectral density:
 
         .. math::
 
