Get rid of unnecessary return; statements.

PiperOrigin-RevId: 601517024

Author: blickly

src/com/google/javascript/jscomp/ClosureRewriteModule.java

@@ -1063,7 +1063,6 @@ private void maybeRecordExportDeclaration(NodeTraversal t, Node n) {
       recordExportToInline(defaultExport);
     }
 
-    return;
   }
 
   private void updateModuleBodyEarly(Node moduleScopeRoot) {
@@ -1649,7 +1648,6 @@ private void maybeUpdateExportDeclaration(NodeTraversal t, Node n) {
     compiler.reportChangeToEnclosingScope(jsdocNode);
 
     maybeUpdateExportObjectLiteral(t, rhs);
-    return;
   }
 
   private void maybeUpdateExportNameRef(NodeTraversal t, Node n) {

src/com/google/javascript/jscomp/RewriteGoogJsImports.java

@@ -188,7 +188,6 @@ private void maybeRewriteBadGoogJsImportRef(NodeTraversal t, Node nameNode, Node
       nameNode.setString("$goog");
       t.reportCodeChange();
 
-      return;
     }
 
     @Override

src/com/google/javascript/rhino/jstype/FunctionType.java

@@ -973,7 +973,6 @@ void appendTo(TypeStringBuilder sb) {
     sb.appendNonNull(call.getReturnType());
 
     setPrettyPrint(true);
-    return;
   }
 
   private void appendArgString(TypeStringBuilder sb, Parameter p) {