UI fixes

web-app/frontend/src/components/activities/mentalChronometryEval/pairCancerlation/PairCancerlationContainer.jsx

@@ -7,7 +7,6 @@ import PCB2 from "./img/PCB2.png";
 import PCB3 from "./img/PCB3.png";
 import PCB4 from "./img/PCB4.png";
 import PCA1 from "./img/PCA1.png";
-import PCA2 from "./img/PCA2.png";
 import PCA3 from "./img/PCA3.png";
 import PCA4 from "./img/PCA4.png";
 // import { PCA1, PCB1 } from "./img/";