Stop clearing fields/methods on mixin classes

This seems to break generating the needed bridge access$xxx methods
for inner classes in mixins.

Example mixin that breaks: https://github.com/Layers-of-Railways/Railway/blob/d5b3c910aceb7dadefa832aa85d79c55d49012e0/common/src/main/java/com/railwayteam/railways/mixin/client/MixinStationScreen.java

common/src/main/java/org/embeddedt/modernfix/util/ClassInfoManager.java

@@ -12,7 +12,6 @@
 
 import java.lang.reflect.Field;
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 
@@ -54,15 +53,13 @@ private static void disableLoggers() throws ReflectiveOperationException {
 
     private static void doClear() {
         Map<String, ClassInfo> classInfoCache;
-        Field mixinField, stateField, classNodeField, methodsField, fieldsField;
+        Field mixinField, stateField, classNodeField;
         Class<?> stateClz;
         try {
             disableLoggers();
             Field field = accessible(ClassInfo.class.getDeclaredField("cache"));
             classInfoCache = (Map<String, ClassInfo>) field.get(null);
             mixinField = accessible(ClassInfo.class.getDeclaredField("mixin"));
-            methodsField = accessible(ClassInfo.class.getDeclaredField("methods"));
-            fieldsField = accessible(ClassInfo.class.getDeclaredField("fields"));
             stateClz = Class.forName("org.spongepowered.asm.mixin.transformer.MixinInfo$State");
             stateField = accessible(Class.forName("org.spongepowered.asm.mixin.transformer.MixinInfo").getDeclaredField("state"));
             classNodeField = accessible(stateClz.getDeclaredField("classNode"));
@@ -87,9 +84,6 @@ private static void doClear() {
                         if (state != null)
                             classNodeField.set(state, emptyNode);
                     }
-                    // clear fields, methods
-                    ((Collection<?>)methodsField.get(mixinClz)).clear();
-                    ((Collection<?>)fieldsField.get(mixinClz)).clear();
                 } catch (ReflectiveOperationException | RuntimeException e) {
                     e.printStackTrace();
                 }