[plotter] removed unused overlay_kennicut

plotter.py

@@ -1320,26 +1320,6 @@ class Plotter(Aggregator, BaseProcessor):
                 label = r"Power-law fit with index {:.1f}".format(a)
             plt.plot(x, (10 ** b) * x ** a, label=label, **kwargs)
 
-    def overlay_kennicutt(self, n0, step):
-        """
-        Add an overlay : Kennicutt mass accretion
-        """
-        plt.grid(False)
-        ylim = plt.ylim()
-        (tmin, tmax) = plt.xlim()
-        tmax = tmax + 20
-        ymax = plt.ylim()[1]
-        ssfr_sun = 2.5e-9
-        ssfr_ken = ssfr_sun * n0 ** 1.4
-
-        coeff = ssfr_ken * 1e6 * (self.study.info["unit_length"].express(U.pc)) ** 2
-        for i in np.arange(tmin, max(tmax, tmin + ymax / coeff), step):
-            t = np.linspace(0, tmax, 1000)
-            plt.plot(t + i, t * coeff, ls="--", lw=0.9, color="grey")
-            plt.plot(t + tmin, (t + i - tmin) * coeff, ls="--", lw=0.9, color="grey")
-        plt.xlim(tmin, tmax)
-        plt.ylim(ylim)
-
     def _gen_from_log(self, logrule, name_y, name_x="time", description="Generated"):
         if name_x == "time":
             name_rule = name_y