Remove MainContainer as it is the same as Container

src/Components/SVG/Elements/MainContainer.tsx

@@ -1,30 +0,0 @@
-import * as React from 'react';
-import { Container } from './Container';
-
-interface IMainContainerProps {
-  children: Container[],
-  width: number,
-  height: number,
-}
-
-export class MainContainer extends React.Component<IMainContainerProps> {
-  public render() {
-    const style: React.CSSProperties = {
-      fillOpacity: 0,
-      stroke: 'black'
-    };
-
-    return (
-      <Container
-      id={'main'}
-      x={0}
-      y={0}
-      width={this.props.width}
-      height={this.props.height}
-      style={style}
-      >
-        { this.props.children }
-      </Container>
-    );
-  }
-}