Fix missing overrides that were omitted due to the now-deleted J2CL build

For CompilerTestCase, just removes the missing override suppression without adding @OverRide, since overriding getName() doesn't actually work with @OverRide.

PiperOrigin-RevId: 707162967

Author: lauraharker

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

@@ -53,7 +53,7 @@ private static final class CharPriority implements Comparable<CharPriority>, Ser
       this.occurrence = 0;
     }
 
-    // @Override removed for GWT compatibility
+    @Override
     public CharPriority clone() {
       CharPriority result = new CharPriority(name, order);
       result.occurrence = occurrence;

src/com/google/javascript/rhino/JSDocInfo.java

@@ -651,7 +651,7 @@ private Builder toBuilder(@Nullable TypeTransform transform) {
     return builder;
   }
 
-  @SuppressWarnings("MissingOverride") // Adding @Override breaks the GWT compilation.
+  @Override
   public JSDocInfo clone() {
     return clone(false);
   }

test/com/google/javascript/jscomp/CompilerTestCase.java

@@ -664,7 +664,6 @@ protected CompilerTestCase() {
     this("");
   }
 
-  @SuppressWarnings("MissingOverride")
   public String getName() {
     return this.getClass().getSimpleName();
   }