remove unused code

src/Module.js

@@ -4,7 +4,6 @@ import { parse } from 'acorn';
 import MagicString from 'magic-string';
 import Statement from './Statement';
 import walk from './ast/walk';
-import analyse from './ast/analyse';
 import { blank, keys } from './utils/object';
 import { first, sequence } from './utils/promise';
 import { isImportDeclaration, isExportDeclaration } from './utils/map-helpers';
@@ -180,12 +179,10 @@ export default class Module {
 		this.statements.forEach( statement => {
 			if ( isImportDeclaration( statement ) ) this.addImport( statement );
 			else if ( isExportDeclaration( statement ) ) this.addExport( statement );
-		});
 
-		analyse( this.magicString, this );
+			statement.analyse();
 
-		// consolidate names that are defined/modified in this module
-		this.statements.forEach( statement => {
+			// consolidate names that are defined/modified in this module
 			keys( statement.defines ).forEach( name => {
 				this.definitions[ name ] = statement;
 			});

src/Statement.js

@@ -24,10 +24,6 @@ export default class Statement {
 
 		this.isIncluded = false;
 
-		this.leadingComments = [];
-		this.trailingComment = null;
-		this.margin = [ 0, 0 ];
-
 		// some facts about this statement...
 		this.isImportDeclaration = node.type === 'ImportDeclaration';
 		this.isExportDeclaration = /^Export/.test( node.type );

src/ast/analyse.js

@@ -1,66 +0,0 @@
-export default function analyse ( magicString, module ) {
-	// first we need to generate comprehensive scope info
-	let previousStatement = null;
-	let commentIndex = 0;
-
-	module.statements.forEach( statement => {
-		const node = statement.node;
-
-		let trailing = !!previousStatement;
-		let previousComment;
-
-		// TODO surely this can be neater
-		// attach leading comment
-		do {
-			let comment = module.comments[ commentIndex ];
-
-			// prevent comments inside the previous statement being
-			// appended to it
-			if ( previousStatement ) {
-				while ( comment && comment.start < previousStatement.node.end ) {
-					commentIndex += 1;
-					comment = module.comments[ commentIndex ];
-				}
-			}
-
-			if ( !comment || ( comment.end > node.start ) ) break;
-
-			// attach any trailing comment to the previous statement
-			if ( trailing && !/\n/.test( module.source.slice( previousStatement.node.end, comment.start ) ) ) {
-				previousStatement.trailingComment = comment;
-			}
-
-			// then attach leading comments to this statement
-			else {
-				statement.leadingComments.push({
-					separator: previousComment ? magicString.slice( previousComment.end, comment.start ) : '\n',
-					comment
-				});
-
-				previousComment = comment;
-			}
-
-			commentIndex += 1;
-			trailing = false;
-		} while ( module.comments[ commentIndex ] );
-
-		// determine margin
-		const previousEnd = previousComment ?
-			previousComment.end :
-			previousStatement ?
-				( previousStatement.trailingComment || previousStatement.node ).end :
-				0;
-
-		//const start = ( statement.leadingComments[0] || node ).start;
-
-		const gap = magicString.original.slice( previousEnd, node.start );
-		const margin = gap.split( '\n' ).length;
-
-		if ( previousStatement ) previousStatement.margin[1] = margin;
-		statement.margin[0] = margin;
-
-		statement.analyse();
-
-		previousStatement = statement;
-	});
-}