Breaking: Remove mapSources option (ref #19)

index.js

@@ -89,14 +89,8 @@ function write(file, options, callback) {
 	// fix paths if Windows style paths
 	sourceMap.file = helpers.unixStylePath(file.relative);
 
-	// TODO: Need a way to handle resolve this before passing in
-	// This module shouldn't be taking function options because they are normalized higher
-	if (options.mapSources && typeof options.mapSources === 'function') {
-		sourceMap.sources = sourceMap.sources.map(function(filePath) {
-			return options.mapSources(filePath);
-		});
-	}
-
+	// TODO: should we be normalizing at all?
+	// An end-user can use @gulp-sourcemaps/map-sources if they need normalization
 	sourceMap.sources = sourceMap.sources.map(function(filePath) {
 		return helpers.unixStylePath(filePath);
 	});

test/write.js

@@ -450,18 +450,6 @@ describe('write', function() {
 		});
 	});
 
-	it('should allow to change sources', function(done) {
-		var file = makeFile();
-		sourcemaps.write(file, {
-			mapSources: function(sourcePath) {
-				return '../src/' + sourcePath;
-			}
-		}, function(err, updatedFile) {
-			expect(updatedFile.sourceMap.sources).toEqual(['../src/helloworld.js']);
-			done(err);
-		});
-	});
-
 	it('should create shortest path to file in sourceMap#file', function(done) {
 		var file = makeNestedFile();
 		sourcemaps.write(file, { path: 'dir1/maps' }, function(err, updatedFile) {