Update cheatsheet.fr.md

12.temporary_ins/90.electromagnetism-in-vacuum/10.maxwell-equations/20.overview/cheatsheet.fr.md

@@ -683,14 +683,6 @@ $`\mathbf{div\,\big(\overrightarrow{U}\land\overrightarrow{V}\big)=
   &\quad-\,\overrightarrow{E}\cdot\big(\underbrace{\overrightarrow{rot}\,\overrightarrow{B}}_{\color{blue}{=\mu_0\,\vec{j}+\mu_0\epsilon_0\frac{\partial \vec{E}}{\partial t}
   }}\big)\end{align}`$   
   <br>
-  $`div\,\big(\overrightarrow{E}\land\overrightarrow{B}\big)
-  =\overrightarrow{B}\cdot
-  \big(
-  \underbrace{\overrightarrow{rot}\,\overrightarrow{E}}
-  _{\color{blue}{=-\frac{\partial \vec{B}}{\partial t}}}\big)\,
-  -\,\overrightarrow{E}\cdot\big(\underbrace{\overrightarrow{rot}\,\overrightarrow{B}}_{\color{blue}{=\mu_0\,\vec{j}+\mu_0\epsilon_0\frac{\partial \vec{E}}{\partial t}
-  }}\big)`$   
-  <br>
   $`div\,\big(\overrightarrow{E}\land\overrightarrow{B}\big)`$    
   $`\quad=-\,\mu_0\,\vec{j}\cdot\overrightarrow{E}\,-\,\mu_0\,\epsilon_0\dfrac{\partial \vec{E}}{\partial t}\cdot\overrightarrow{E}
   \,