Update cheatsheet.fr.md

12.temporary_ins/20.magnetostatics-vacuum/40.ampere-theorem-applications/30.cylindrical-current-distributions/10.rectilinear-current/10.ampere-integral/20.overview/cheatsheet.fr.md

@@ -209,7 +209,6 @@ $`\displaystyle\quad\quad=\rho_M\,B_{\varphi}(\rho_M)\,\oint_{\varphi=0}^{\varph
 
 <br>
 * Si *$`\mathbf{\overrightarrow{dl}=-\,\rho_M\,d\varphi\,\overrightarrow{e_{\varphi}}}`$* :   
-<br>
 *$`\mathbf{\oint_{\Gamma_A}\overrightarrow{B}\cdot\overrightarrow{dl}}`$*   
 <br>
 $`\displaystyle\quad\quad=\oint_{\varphi=0}^{\varphi=2\pi}\big(B_{\varphi}(\rho_M)\,\overrightarrow{e_{\varphi}}\big)\cdot \big(-\rho_M\,d\varphi\,\overrightarrow{e_{\varphi}}\big)`$