Update README.md

Author: alexkenan

README.md

@@ -22,36 +22,3 @@ Learn more about the *Python for Mechanical and Aerospace Engineering* book [her
 
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-
-## Correction
-
-Turns out, I was right to be skeptical of 1 billion psf as the maximum dynamic pressure in Chapter 3! I mis-interpreted the NASA atmospheric model and treated pressure as density. 
-This corrected density function should give you the original Max Q psf average acceleration of 1,395 psf:
-
-    def density_corrected(height: float) -> float:
-        """
-        Returns the air density in slug/ft^3 based on altitude
-        Equations from https://www.grc.nasa.gov/www/k-12/rocket/atmos.html
-        :param height: Altitude in feet
-        :return: Density in slugs/ft^3
-        """
-        if height < 36152.0:
-            temp = 59 - 0.00356 * height
-            p = 2116 * ((temp + 459.7)/518.6)**5.256
-        elif 36152 <= height < 82345:
-            temp = -70
-            p = 473.1*np.exp(1.73 - 0.000048*height)
-        else:
-            temp = -205.05 + 0.00164 * height
-            p = 51.97*((temp + 459.7)/389.98)**-11.388
-
-        rho = p/(1718*(temp + 459.7))
-        return rho
-
-You will have to adjust the plotting offsets in `chap3.py` to correct for the changed scale and magnitude:
-
-> xytext=(x_values[ind] + 15, ~~max_val + 1E5~~),
-
-should be
-
-> xytext=(x_values[ind] + 15, **max_val + 15**),