remove the new line after targeted line

Author: zhengbli

src/services/codefixes/unusedIdentifierFixes.ts

@@ -150,7 +150,20 @@ namespace ts.codefix {
             }
 
             function createCodeFixToRemoveNode(node: Node) {
-                return createCodeFix("", node.getStart(), node.getWidth());
+                let end = node.getEnd();
+                const endCharCode = sourceFile.text.charCodeAt(end);
+                const afterEndCharCode = sourceFile.text.charCodeAt(end + 1);
+                if (isLineBreak(endCharCode)) {
+                    end += 1;
+                }
+                // in the case of CR LF, you could have two consecutive new line characters for one new line.
+                // this needs to be differenciated from two LF LF chars that actually mean two new lines.
+                if (isLineBreak(afterEndCharCode) && endCharCode !== afterEndCharCode) {
+                    end += 1;
+                }
+
+                const start = node.getStart();
+                return createCodeFix("", start, end - start);
             }
 
             function findFirstNonSpaceCharPosStarting(start: number) {